https://wiki.kitz.co.uk/index.php?title=Glossary&feed=atom&action=historyGlossary - Revision history2024-03-29T08:01:47ZRevision history for this page on the wikiMediaWiki 1.29.0https://wiki.kitz.co.uk/index.php?title=Glossary&diff=385&oldid=prevRoseway: /* Abbreviations */2012-04-18T09:43:11Z<p><span dir="auto"><span class="autocomment">Abbreviations</span></span></p>
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<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''dB''' - Decibel. A measure of gain or loss in a system. See [[Decibels|Decibels in the context of ADSL]]</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''dB''' - Decibel. A measure of gain or loss in a system. See [[Decibels|Decibels in the context of ADSL]]</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''CRC''' - Cyclic Redundancy Check. A technique for detecting errors in data transmission. When the receiving equipment detects a CRC error in a packet of data, it requests a retransmission of that packet. For more information see [http://www.kitz.co.uk/adsl/error_correction.htm Error correction article].</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''CRC''' - Cyclic Redundancy Check. A technique for detecting errors in data transmission. When the receiving equipment detects a CRC error in a packet of data, it requests a retransmission of that packet. For more information see [http://www.kitz.co.uk/adsl/error_correction.htm Error correction article].</div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">* '''DACS''' - Digital Access Carrier System. A system for carrying two telephone signals over a single cable pair, now deprecated. See [[DACS|DACS article]].</ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''DLM''' - Dynamic Line Management. A process which continually monitors the performance of a '''DSL''' connection, and adjusts the '''interleaving''' status and '''target noise margin''' as appropriate in order to try to maintain the best possible stable connection. Originally used by BT Wholesale, a form of DLM is also used by some LLU operators. See [http://www.kitz.co.uk/adsl/maxdsl2.htm How DSL Max Works].</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''DLM''' - Dynamic Line Management. A process which continually monitors the performance of a '''DSL''' connection, and adjusts the '''interleaving''' status and '''target noise margin''' as appropriate in order to try to maintain the best possible stable connection. Originally used by BT Wholesale, a form of DLM is also used by some LLU operators. See [http://www.kitz.co.uk/adsl/maxdsl2.htm How DSL Max Works].</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''DMT''' - Discrete Multi Tone. A method of converting digital data into tones or frequencies that can be carried over telephone wire. [http://www.kitz.co.uk/adsl/adsl_technology.htm#dmt DMT in ADSL Technology article]</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''DMT''' - Discrete Multi Tone. A method of converting digital data into tones or frequencies that can be carried over telephone wire. [http://www.kitz.co.uk/adsl/adsl_technology.htm#dmt DMT in ADSL Technology article]</div></td></tr>
</table>Rosewayhttps://wiki.kitz.co.uk/index.php?title=Glossary&diff=328&oldid=prevRoseway: /* Technical terms */2012-01-15T15:53:58Z<p><span dir="auto"><span class="autocomment">Technical terms</span></span></p>
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<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''Attenuation''' - The amount by which the signal level is reduced over its path from one point to another. In the context of broadband, this means the reduction in signal level over the length of the telephone line.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''Attenuation''' - The amount by which the signal level is reduced over its path from one point to another. In the context of broadband, this means the reduction in signal level over the length of the telephone line.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''Backhaul''' - The intermediate link between a subnetwork and the core network of a system. In the context of '''ADSL''', the backhaul is the pipe between the exchange and the '''ATM''' cloud. See [http://www.kitz.co.uk/adsl/equip2.htm How ADSL works] for more explanation.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''Backhaul''' - The intermediate link between a subnetwork and the core network of a system. In the context of '''ADSL''', the backhaul is the pipe between the exchange and the '''ATM''' cloud. See [http://www.kitz.co.uk/adsl/equip2.htm How ADSL works] for more explanation.</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>* '''bRAS profile''' - A BT term for a download speed limit which is applied to a DSL connection, based on the connection (sync) speed. The bRAS profile includes some overheads, and after these are deducted, what's left is the '''IP profile''' which is the practical speed limit. See [http://www.kitz.co.uk/adsl/IPprofile.htm<del class="diffchange diffchange-inline">#IP_and_bRAS_profiles </del>IP/bRAS profile].</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* '''bRAS profile''' - A BT term for a download speed limit which is applied to a DSL connection, based on the connection (sync) speed. The bRAS profile includes some overheads, and after these are deducted, what's left is the '''IP profile''' which is the practical speed limit. See [http://www.kitz.co.uk/adsl/IPprofile.htm IP/bRAS profile].</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''Downstream''' - Refers to the movement of data towards the user from a remote location.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''Downstream''' - Refers to the movement of data towards the user from a remote location.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''Ethernet''' - A family of computer networking technologies for wired LANs. The standards include several different types of cable and connector, but the dominant style in the broadband context is the [http://www.kitz.co.uk/adsl/connectors.htm RJ45 connector] with twisted-pair cable (e.g. Cat5e).</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''Ethernet''' - A family of computer networking technologies for wired LANs. The standards include several different types of cable and connector, but the dominant style in the broadband context is the [http://www.kitz.co.uk/adsl/connectors.htm RJ45 connector] with twisted-pair cable (e.g. Cat5e).</div></td></tr>
</table>Rosewayhttps://wiki.kitz.co.uk/index.php?title=Glossary&diff=324&oldid=prevRoseway at 11:11, 12 January 20122012-01-12T11:11:53Z<p></p>
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<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''Attenuation''' - The amount by which the signal level is reduced over its path from one point to another. In the context of broadband, this means the reduction in signal level over the length of the telephone line.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''Attenuation''' - The amount by which the signal level is reduced over its path from one point to another. In the context of broadband, this means the reduction in signal level over the length of the telephone line.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''Backhaul''' - The intermediate link between a subnetwork and the core network of a system. In the context of '''ADSL''', the backhaul is the pipe between the exchange and the '''ATM''' cloud. See [http://www.kitz.co.uk/adsl/equip2.htm How ADSL works] for more explanation.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''Backhaul''' - The intermediate link between a subnetwork and the core network of a system. In the context of '''ADSL''', the backhaul is the pipe between the exchange and the '''ATM''' cloud. See [http://www.kitz.co.uk/adsl/equip2.htm How ADSL works] for more explanation.</div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">* '''bRAS profile''' - A BT term for a download speed limit which is applied to a DSL connection, based on the connection (sync) speed. The bRAS profile includes some overheads, and after these are deducted, what's left is the '''IP profile''' which is the practical speed limit. See [http://www.kitz.co.uk/adsl/IPprofile.htm#IP_and_bRAS_profiles IP/bRAS profile].</ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''Downstream''' - Refers to the movement of data towards the user from a remote location.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''Downstream''' - Refers to the movement of data towards the user from a remote location.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''Ethernet''' - A family of computer networking technologies for wired LANs. The standards include several different types of cable and connector, but the dominant style in the broadband context is the [http://www.kitz.co.uk/adsl/connectors.htm RJ45 connector] with twisted-pair cable (e.g. Cat5e).</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''Ethernet''' - A family of computer networking technologies for wired LANs. The standards include several different types of cable and connector, but the dominant style in the broadband context is the [http://www.kitz.co.uk/adsl/connectors.htm RJ45 connector] with twisted-pair cable (e.g. Cat5e).</div></td></tr>
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<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''Hub''' - A networking device which links together a number of computers and associated devices. Normally incorporates several '''ethernet''' ports. See also '''Switch'''.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''Hub''' - A networking device which links together a number of computers and associated devices. Normally incorporates several '''ethernet''' ports. See also '''Switch'''.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''Interleaving''' - A technique for improving the quality of a connection which is subject to interference. The data stream is separated into small packets and rearranged together with error correction procedures. This reduces the error rate but increases the latency ('ping') of the connection. See [http://www.kitz.co.uk/adsl/interleaving.htm Interleaving explained]. See also '''Fastpath'''.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''Interleaving''' - A technique for improving the quality of a connection which is subject to interference. The data stream is separated into small packets and rearranged together with error correction procedures. This reduces the error rate but increases the latency ('ping') of the connection. See [http://www.kitz.co.uk/adsl/interleaving.htm Interleaving explained]. See also '''Fastpath'''.</div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">* '''IP profile''' - A BT term for a download speed limit which is applied to a DSL connection, based on the connection (sync) speed. The IP profile is derived from the '''bRAS profile''' with an allowance for overheads. See [http://www.kitz.co.uk/adsl/IPprofile.htm#IP_and_bRAS_profiles IP/bRAS profile].</ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''Local loop''' - The connection between the telephone exchange and the customer's premises.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''Local loop''' - The connection between the telephone exchange and the customer's premises.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''MAC address''' - See '''MAC'''(2)</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''MAC address''' - See '''MAC'''(2)</div></td></tr>
</table>Rosewayhttps://wiki.kitz.co.uk/index.php?title=Glossary&diff=323&oldid=prevRoseway at 08:13, 11 January 20122012-01-11T08:13:00Z<p></p>
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<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''SNR margin''' - See '''Noise margin'''.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''SNR margin''' - See '''Noise margin'''.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''Switch''' - A networking device which performs the same function as a '''hub''', but with some extra intelligence. It remembers the IP address of each connected device, and which port it's connected to, so it doesn't have to repeatedly poll the network.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''Switch''' - A networking device which performs the same function as a '''hub''', but with some extra intelligence. It remembers the IP address of each connected device, and which port it's connected to, so it doesn't have to repeatedly poll the network.</div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">* '''Target noise margin''' - Also known as Target SNR Margin. The initial value of '''noise margin''' which is applied at the time when a '''DSL''' connection is being negotiated. If a connection is subject to interference which makes the connection unstable, the target noise margin can be increased to give more noise margin 'headroom', to make the connection more stable. This will have the effect of reducing the connection speed. See also '''DLM'''.</ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''Test socket''' - In an NTE5A master socket the faceplate can be removed to expose an internal socket into which you can plug a '''modem/router''' and/or telephone. As the extension sockets are wired into the removeable faceplate, this action disconnects all of the extensions, as an aid to diagnosis of problems. See [http://www.kitz.co.uk/adsl/troubleshooting.htm Trouble shooting].</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''Test socket''' - In an NTE5A master socket the faceplate can be removed to expose an internal socket into which you can plug a '''modem/router''' and/or telephone. As the extension sockets are wired into the removeable faceplate, this action disconnects all of the extensions, as an aid to diagnosis of problems. See [http://www.kitz.co.uk/adsl/troubleshooting.htm Trouble shooting].</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''Upstream''' - Refers to the movement of data away from the user towards a remote location.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''Upstream''' - Refers to the movement of data away from the user towards a remote location.</div></td></tr>
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<td colspan="2" class="diff-lineno">Line 37:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''dB''' - Decibel. A measure of gain or loss in a system. See [[Decibels|Decibels in the context of ADSL]]</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''dB''' - Decibel. A measure of gain or loss in a system. See [[Decibels|Decibels in the context of ADSL]]</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''CRC''' - Cyclic Redundancy Check. A technique for detecting errors in data transmission. When the receiving equipment detects a CRC error in a packet of data, it requests a retransmission of that packet. For more information see [http://www.kitz.co.uk/adsl/error_correction.htm Error correction article].</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''CRC''' - Cyclic Redundancy Check. A technique for detecting errors in data transmission. When the receiving equipment detects a CRC error in a packet of data, it requests a retransmission of that packet. For more information see [http://www.kitz.co.uk/adsl/error_correction.htm Error correction article].</div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">* '''DLM''' - Dynamic Line Management. A process which continually monitors the performance of a '''DSL''' connection, and adjusts the '''interleaving''' status and '''target noise margin''' as appropriate in order to try to maintain the best possible stable connection. Originally used by BT Wholesale, a form of DLM is also used by some LLU operators. See [http://www.kitz.co.uk/adsl/maxdsl2.htm How DSL Max Works].</ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''DMT''' - Discrete Multi Tone. A method of converting digital data into tones or frequencies that can be carried over telephone wire. [http://www.kitz.co.uk/adsl/adsl_technology.htm#dmt DMT in ADSL Technology article]</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''DMT''' - Discrete Multi Tone. A method of converting digital data into tones or frequencies that can be carried over telephone wire. [http://www.kitz.co.uk/adsl/adsl_technology.htm#dmt DMT in ADSL Technology article]</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''DSL''' - Digital Subscriber Line. A generic name for a group of technologies which enable the transmission of digital data over a telephone line.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''DSL''' - Digital Subscriber Line. A generic name for a group of technologies which enable the transmission of digital data over a telephone line.</div></td></tr>
</table>Rosewayhttps://wiki.kitz.co.uk/index.php?title=Glossary&diff=322&oldid=prevJid: /* Abbreviations */2012-01-09T17:11:04Z<p><span dir="auto"><span class="autocomment">Abbreviations</span></span></p>
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<td colspan='2' style="background-color: white; color:black; text-align: center;">Revision as of 17:11, 9 January 2012</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l36" >Line 36:</td>
<td colspan="2" class="diff-lineno">Line 36:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''dB''' - Decibel. A measure of gain or loss in a system. See [[Decibels|Decibels in the context of ADSL]]</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''dB''' - Decibel. A measure of gain or loss in a system. See [[Decibels|Decibels in the context of ADSL]]</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''CRC''' - Cyclic Redundancy Check. A technique for detecting errors in data transmission. When the receiving equipment detects a CRC error in a packet of data, it requests a retransmission of that packet. For more information see [http://www.kitz.co.uk/adsl/error_correction.htm Error correction article].</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''CRC''' - Cyclic Redundancy Check. A technique for detecting errors in data transmission. When the receiving equipment detects a CRC error in a packet of data, it requests a retransmission of that packet. For more information see [http://www.kitz.co.uk/adsl/error_correction.htm Error correction article].</div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">* '''DMT''' - Discrete Multi Tone. A method of converting digital data into tones or frequencies that can be carried over telephone wire. [http://www.kitz.co.uk/adsl/adsl_technology.htm#dmt DMT in ADSL Technology article]</ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''DSL''' - Digital Subscriber Line. A generic name for a group of technologies which enable the transmission of digital data over a telephone line.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''DSL''' - Digital Subscriber Line. A generic name for a group of technologies which enable the transmission of digital data over a telephone line.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''DSLAM''' - Digital Subscriber Line Access Multiplexer. A network device, usually housed in a telephone exchange, which connects multiple user '''DSL''' interfaces into the high speed '''ATM''' backbone. See [http://www.kitz.co.uk/adsl/equip.htm How ADSL works].</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''DSLAM''' - Digital Subscriber Line Access Multiplexer. A network device, usually housed in a telephone exchange, which connects multiple user '''DSL''' interfaces into the high speed '''ATM''' backbone. See [http://www.kitz.co.uk/adsl/equip.htm How ADSL works].</div></td></tr>
</table>Jidhttps://wiki.kitz.co.uk/index.php?title=Glossary&diff=317&oldid=prevRoseway at 16:17, 9 January 20122012-01-09T16:17:01Z<p></p>
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<td colspan='2' style="background-color: white; color:black; text-align: center;">Revision as of 16:17, 9 January 2012</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l35" >Line 35:</td>
<td colspan="2" class="diff-lineno">Line 35:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''ATM''' - Asynchronous Transfer Mode. A switching protocol which is designed to unify telecommunication and computer networks. Data is encoded into small fixed-sized cells, and combined using time division multiplexing.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''ATM''' - Asynchronous Transfer Mode. A switching protocol which is designed to unify telecommunication and computer networks. Data is encoded into small fixed-sized cells, and combined using time division multiplexing.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''dB''' - Decibel. A measure of gain or loss in a system. See [[Decibels|Decibels in the context of ADSL]]</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''dB''' - Decibel. A measure of gain or loss in a system. See [[Decibels|Decibels in the context of ADSL]]</div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">* '''CRC''' - Cyclic Redundancy Check. A technique for detecting errors in data transmission. When the receiving equipment detects a CRC error in a packet of data, it requests a retransmission of that packet. For more information see [http://www.kitz.co.uk/adsl/error_correction.htm Error correction article].</ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''DSL''' - Digital Subscriber Line. A generic name for a group of technologies which enable the transmission of digital data over a telephone line.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''DSL''' - Digital Subscriber Line. A generic name for a group of technologies which enable the transmission of digital data over a telephone line.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''DSLAM''' - Digital Subscriber Line Access Multiplexer. A network device, usually housed in a telephone exchange, which connects multiple user '''DSL''' interfaces into the high speed '''ATM''' backbone. See [http://www.kitz.co.uk/adsl/equip.htm How ADSL works].</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''DSLAM''' - Digital Subscriber Line Access Multiplexer. A network device, usually housed in a telephone exchange, which connects multiple user '''DSL''' interfaces into the high speed '''ATM''' backbone. See [http://www.kitz.co.uk/adsl/equip.htm How ADSL works].</div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">* '''FEC''' - Forward Error Correction. A technique for reducing errors in data transmission over noisy channels. Commonly used in conjunction with '''interleaving'''. FEC errors are errors which have been autocorrected by the use of FEC, and therefore do not require retransmission of the data. For more information see [http://www.kitz.co.uk/adsl/error_correction.htm Error correction article].</ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''FTTC''' - Fibre To The Cabinet. A hybrid arrangement for telephone lines; fibre-optic cable links the exchange to street cabinets, and copper cable links the cabinets to user premises. Used for BT Infinity and similar offerings from other ISPs.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''FTTC''' - Fibre To The Cabinet. A hybrid arrangement for telephone lines; fibre-optic cable links the exchange to street cabinets, and copper cable links the cabinets to user premises. Used for BT Infinity and similar offerings from other ISPs.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''FTTP''' - Fibre To The Premises. Fibre-optic cable links the exchange directly to user premises.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''FTTP''' - Fibre To The Premises. Fibre-optic cable links the exchange directly to user premises.</div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">* '''HEC''' - Header Error Control. A technique for detecting and partially correcting errors in data transmission. For more information see [http://www.kitz.co.uk/adsl/error_correction.htm Error correction article].</ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''ISDN''' - Integrated Services Digital Network. A set of standards for simultaneous digital transmission of voice, video, data and other services over a telephone line. Used in some countries for internet access, but largely superseded by '''DSL'''.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''ISDN''' - Integrated Services Digital Network. A set of standards for simultaneous digital transmission of voice, video, data and other services over a telephone line. Used in some countries for internet access, but largely superseded by '''DSL'''.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''LAN''' - Local Area Network. A network of computers and associated devices which is entirely within a limited area, such as a house, school or office building.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''LAN''' - Local Area Network. A network of computers and associated devices which is entirely within a limited area, such as a house, school or office building.</div></td></tr>
</table>Rosewayhttps://wiki.kitz.co.uk/index.php?title=Glossary&diff=296&oldid=prevRoseway: /* Technical terms */2012-01-01T11:14:47Z<p><span dir="auto"><span class="autocomment">Technical terms</span></span></p>
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<td colspan='2' style="background-color: white; color:black; text-align: center;">Revision as of 11:14, 1 January 2012</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l19" >Line 19:</td>
<td colspan="2" class="diff-lineno">Line 19:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''Microfilter''' - Also known as 'ADSL filter', 'DSL filter' or 'Splitter'. A device which plugs into a telephone socket and separates the voice signals from the DSL signals. The voice side has a low-pass filter which blocks frequencies over about 5 kHz, and the '''DSL''' side is unfiltered.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''Microfilter''' - Also known as 'ADSL filter', 'DSL filter' or 'Splitter'. A device which plugs into a telephone socket and separates the voice signals from the DSL signals. The voice side has a low-pass filter which blocks frequencies over about 5 kHz, and the '''DSL''' side is unfiltered.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''Modem''' - Modulator/demodulator. A device which enables digital data to be carried over an analogue link. Outgoing digital data is modulated onto an analogue signal and transmitted along a telephone line (typically); incoming analogue signals from the telephone line are demodulated in order to reconstruct their digital content. For a link to work in this way, there must be compatible modems, or equivalent functionality, at both ends of the link.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''Modem''' - Modulator/demodulator. A device which enables digital data to be carried over an analogue link. Outgoing digital data is modulated onto an analogue signal and transmitted along a telephone line (typically); incoming analogue signals from the telephone line are demodulated in order to reconstruct their digital content. For a link to work in this way, there must be compatible modems, or equivalent functionality, at both ends of the link.</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>* '''Modem/router''' - A device which combines a '''DSL''' modem and a router in a single package. Most modem/routers also include a network '''switch''' and a firewall, to make them into an all-in-one solution for internet access.</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* '''Modem/router''' - A device which combines a '''DSL''' modem and a router in a single package. Most modem/routers also include a network '''switch''' and a <ins class="diffchange diffchange-inline">'''</ins>firewall<ins class="diffchange diffchange-inline">'''</ins>, to make them into an all-in-one solution for internet access.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''Noise margin''' - The amount by which the '''SNR''' exceeds a specified base level of SNR. In a '''DSL''' connection, the base level of SNR is the level below which a stable connection is not likely to be possible.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''Noise margin''' - The amount by which the '''SNR''' exceeds a specified base level of SNR. In a '''DSL''' connection, the base level of SNR is the level below which a stable connection is not likely to be possible.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''Powerline adaptor''' - See '''Homeplug'''.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''Powerline adaptor''' - See '''Homeplug'''.</div></td></tr>
</table>Rosewayhttps://wiki.kitz.co.uk/index.php?title=Glossary&diff=295&oldid=prevRoseway: /* Technical terms */2012-01-01T11:13:33Z<p><span dir="auto"><span class="autocomment">Technical terms</span></span></p>
<table class="diff diff-contentalign-left" data-mw="interface">
<col class='diff-marker' />
<col class='diff-content' />
<col class='diff-marker' />
<col class='diff-content' />
<tr style='vertical-align: top;' lang='en'>
<td colspan='2' style="background-color: white; color:black; text-align: center;">← Older revision</td>
<td colspan='2' style="background-color: white; color:black; text-align: center;">Revision as of 11:13, 1 January 2012</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l13" >Line 13:</td>
<td colspan="2" class="diff-lineno">Line 13:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''Firmware''' - The 'operating system' of a hardware device, stored in read-only memory or in non volatile read/write memory. In the latter case, the firmware can be upgraded to fix bugs or to change the capabilities of the device. With many types of device, the firmware is actually a computer operating system, using an embedded form of Linux.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''Firmware''' - The 'operating system' of a hardware device, stored in read-only memory or in non volatile read/write memory. In the latter case, the firmware can be upgraded to fix bugs or to change the capabilities of the device. With many types of device, the firmware is actually a computer operating system, using an embedded form of Linux.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''Homeplug''' - A networking device which makes use of domestic electrical wiring to carry '''ethernet''' signals. Two or more devices plugged into mains sockets provide a link between different parts of the building without the need for extra cabling. 'Homeplug' is a trademark of the [http://www.homeplug.org Homeplug Power Alliance].</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''Homeplug''' - A networking device which makes use of domestic electrical wiring to carry '''ethernet''' signals. Two or more devices plugged into mains sockets provide a link between different parts of the building without the need for extra cabling. 'Homeplug' is a trademark of the [http://www.homeplug.org Homeplug Power Alliance].</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>* '''Hub''' - A networking device which links together a number of computers and associated devices. Normally incorporates several '''ethernet <del class="diffchange diffchange-inline">ports</del>'''. See also '''Switch'''.</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* '''Hub''' - A networking device which links together a number of computers and associated devices. Normally incorporates several '''ethernet''' <ins class="diffchange diffchange-inline">ports</ins>. See also '''Switch'''.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''Interleaving''' - A technique for improving the quality of a connection which is subject to interference. The data stream is separated into small packets and rearranged together with error correction procedures. This reduces the error rate but increases the latency ('ping') of the connection. See [http://www.kitz.co.uk/adsl/interleaving.htm Interleaving explained]. See also '''Fastpath'''.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''Interleaving''' - A technique for improving the quality of a connection which is subject to interference. The data stream is separated into small packets and rearranged together with error correction procedures. This reduces the error rate but increases the latency ('ping') of the connection. See [http://www.kitz.co.uk/adsl/interleaving.htm Interleaving explained]. See also '''Fastpath'''.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''Local loop''' - The connection between the telephone exchange and the customer's premises.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''Local loop''' - The connection between the telephone exchange and the customer's premises.</div></td></tr>
</table>Rosewayhttps://wiki.kitz.co.uk/index.php?title=Glossary&diff=294&oldid=prevRoseway at 11:10, 1 January 20122012-01-01T11:10:59Z<p></p>
<table class="diff diff-contentalign-left" data-mw="interface">
<col class='diff-marker' />
<col class='diff-content' />
<col class='diff-marker' />
<col class='diff-content' />
<tr style='vertical-align: top;' lang='en'>
<td colspan='2' style="background-color: white; color:black; text-align: center;">← Older revision</td>
<td colspan='2' style="background-color: white; color:black; text-align: center;">Revision as of 11:10, 1 January 2012</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l6" >Line 6:</td>
<td colspan="2" class="diff-lineno">Line 6:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''Attenuation''' - The amount by which the signal level is reduced over its path from one point to another. In the context of broadband, this means the reduction in signal level over the length of the telephone line.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''Attenuation''' - The amount by which the signal level is reduced over its path from one point to another. In the context of broadband, this means the reduction in signal level over the length of the telephone line.</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>* '''Backhaul''' - The intermediate link between a subnetwork and the core network of a system. In the context of ADSL, the backhaul is the pipe between the exchange and the ATM cloud. See [http://www.kitz.co.uk/adsl/equip2.htm How ADSL works] for more explanation.</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* '''Backhaul''' - The intermediate link between a subnetwork and the core network of a system. In the context of <ins class="diffchange diffchange-inline">'''</ins>ADSL<ins class="diffchange diffchange-inline">'''</ins>, the backhaul is the pipe between the exchange and the <ins class="diffchange diffchange-inline">'''</ins>ATM<ins class="diffchange diffchange-inline">''' </ins>cloud. See [http://www.kitz.co.uk/adsl/equip2.htm How ADSL works] for more explanation.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''Downstream''' - Refers to the movement of data towards the user from a remote location.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''Downstream''' - Refers to the movement of data towards the user from a remote location.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''Ethernet''' - A family of computer networking technologies for wired LANs. The standards include several different types of cable and connector, but the dominant style in the broadband context is the [http://www.kitz.co.uk/adsl/connectors.htm RJ45 connector] with twisted-pair cable (e.g. Cat5e).</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''Ethernet''' - A family of computer networking technologies for wired LANs. The standards include several different types of cable and connector, but the dominant style in the broadband context is the [http://www.kitz.co.uk/adsl/connectors.htm RJ45 connector] with twisted-pair cable (e.g. Cat5e).</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''Fastpath''' - The normal configuration of an ADSL connection which has not had '''interleaving''' applied. Compared to interleaving, fastpath delivers lower latency but a higher error rate in noisy conditions.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''Fastpath''' - The normal configuration of an ADSL connection which has not had '''interleaving''' applied. Compared to interleaving, fastpath delivers lower latency but a higher error rate in noisy conditions.</div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">* '''Firewall''' - A software or hardware device which is intended to protect a system against intrusion. A firewall can be a separate piece of equipment positioned between a '''LAN''' and the outside world; it can be included in another device such as a '''router'''; or it can consist of software running on a computer.</ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''Firmware''' - The 'operating system' of a hardware device, stored in read-only memory or in non volatile read/write memory. In the latter case, the firmware can be upgraded to fix bugs or to change the capabilities of the device. With many types of device, the firmware is actually a computer operating system, using an embedded form of Linux.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''Firmware''' - The 'operating system' of a hardware device, stored in read-only memory or in non volatile read/write memory. In the latter case, the firmware can be upgraded to fix bugs or to change the capabilities of the device. With many types of device, the firmware is actually a computer operating system, using an embedded form of Linux.</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>* '''Homeplug''' - A networking device which makes use of domestic electrical wiring to carry ethernet signals. Two or more devices plugged into mains sockets provide a link between different parts of the building without the need for extra cabling. 'Homeplug' is a trademark of the [http://www.homeplug.org Homeplug Power Alliance].</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* '''Homeplug''' - A networking device which makes use of domestic electrical wiring to carry <ins class="diffchange diffchange-inline">'''</ins>ethernet<ins class="diffchange diffchange-inline">''' </ins>signals. Two or more devices plugged into mains sockets provide a link between different parts of the building without the need for extra cabling. 'Homeplug' is a trademark of the [http://www.homeplug.org Homeplug Power Alliance].</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>* '''Hub''' - A networking device which links together a number of computers and associated devices. Normally incorporates several ethernet ports. See also '''Switch'''.</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* '''Hub''' - A networking device which links together a number of computers and associated devices. Normally incorporates several <ins class="diffchange diffchange-inline">'''</ins>ethernet ports<ins class="diffchange diffchange-inline">'''</ins>. See also '''Switch'''.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''Interleaving''' - A technique for improving the quality of a connection which is subject to interference. The data stream is separated into small packets and rearranged together with error correction procedures. This reduces the error rate but increases the latency ('ping') of the connection. See [http://www.kitz.co.uk/adsl/interleaving.htm Interleaving explained]. See also '''Fastpath'''.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''Interleaving''' - A technique for improving the quality of a connection which is subject to interference. The data stream is separated into small packets and rearranged together with error correction procedures. This reduces the error rate but increases the latency ('ping') of the connection. See [http://www.kitz.co.uk/adsl/interleaving.htm Interleaving explained]. See also '''Fastpath'''.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''Local loop''' - The connection between the telephone exchange and the customer's premises.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''Local loop''' - The connection between the telephone exchange and the customer's premises.</div></td></tr>
<tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l42" >Line 42:</td>
<td colspan="2" class="diff-lineno">Line 43:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''LLU''' - Local Loop Unbundling. An ISP installs its own equipment in a telephone exchange to process '''ADSL''' traffic. See '''MPF''' and '''SMPF'''.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''LLU''' - Local Loop Unbundling. An ISP installs its own equipment in a telephone exchange to process '''ADSL''' traffic. See '''MPF''' and '''SMPF'''.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''MAC'''(1) - Migration Access Code. A code number which enables a customer to migrate from one ISP to another in a seamless fashion. The losing ISP gives the code to the customer, who then gives it to the new ISP. After that, the new ISP manages the changeover.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''MAC'''(1) - Migration Access Code. A code number which enables a customer to migrate from one ISP to another in a seamless fashion. The losing ISP gives the code to the customer, who then gives it to the new ISP. After that, the new ISP manages the changeover.</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>* '''MAC'''(2) - Media Access Control. A MAC address is a globally unique reference number for a network device. The number is most commonly allocated by the device manufacturer and stored in a read-only memory in the device or in its firmware.</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* '''MAC'''(2) - Media Access Control. A MAC address is a globally unique reference number for a network device. The number is most commonly allocated by the device manufacturer and stored in a read-only memory in the device or in its <ins class="diffchange diffchange-inline">'''</ins>firmware<ins class="diffchange diffchange-inline">'''</ins>.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''MPF''' - Metallic Path Facility. A form of '''LLU''' in which the ISP takes over responsibility for voice operations as well as ADSL. Also known as "Full unbundling". See also '''SMPF'''.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''MPF''' - Metallic Path Facility. A form of '''LLU''' in which the ISP takes over responsibility for voice operations as well as ADSL. Also known as "Full unbundling". See also '''SMPF'''.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''MSAN''' - Multi-Service Access Node. A network device, usually housed in a telephone exchange, which connects users' telephone lines to the core network. Combines several different types of service, such as telephone, '''ISDN''' and '''DSL''', into a single port.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''MSAN''' - Multi-Service Access Node. A network device, usually housed in a telephone exchange, which connects users' telephone lines to the core network. Combines several different types of service, such as telephone, '''ISDN''' and '''DSL''', into a single port.</div></td></tr>
</table>Rosewayhttps://wiki.kitz.co.uk/index.php?title=Glossary&diff=293&oldid=prevRoseway at 08:46, 1 January 20122012-01-01T08:46:53Z<p></p>
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<td colspan='2' style="background-color: white; color:black; text-align: center;">Revision as of 08:46, 1 January 2012</td>
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<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''Ethernet''' - A family of computer networking technologies for wired LANs. The standards include several different types of cable and connector, but the dominant style in the broadband context is the [http://www.kitz.co.uk/adsl/connectors.htm RJ45 connector] with twisted-pair cable (e.g. Cat5e).</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''Ethernet''' - A family of computer networking technologies for wired LANs. The standards include several different types of cable and connector, but the dominant style in the broadband context is the [http://www.kitz.co.uk/adsl/connectors.htm RJ45 connector] with twisted-pair cable (e.g. Cat5e).</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''Fastpath''' - The normal configuration of an ADSL connection which has not had '''interleaving''' applied. Compared to interleaving, fastpath delivers lower latency but a higher error rate in noisy conditions.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''Fastpath''' - The normal configuration of an ADSL connection which has not had '''interleaving''' applied. Compared to interleaving, fastpath delivers lower latency but a higher error rate in noisy conditions.</div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">* '''Firmware''' - The 'operating system' of a hardware device, stored in read-only memory or in non volatile read/write memory. In the latter case, the firmware can be upgraded to fix bugs or to change the capabilities of the device. With many types of device, the firmware is actually a computer operating system, using an embedded form of Linux.</ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''Homeplug''' - A networking device which makes use of domestic electrical wiring to carry ethernet signals. Two or more devices plugged into mains sockets provide a link between different parts of the building without the need for extra cabling. 'Homeplug' is a trademark of the [http://www.homeplug.org Homeplug Power Alliance].</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''Homeplug''' - A networking device which makes use of domestic electrical wiring to carry ethernet signals. Two or more devices plugged into mains sockets provide a link between different parts of the building without the need for extra cabling. 'Homeplug' is a trademark of the [http://www.homeplug.org Homeplug Power Alliance].</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>* '''Hub''' - A networking device which links together a number of computers and associated devices. Normally incorporates several ethernet ports.</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* '''Hub''' - A networking device which links together a number of computers and associated devices. Normally incorporates several ethernet ports<ins class="diffchange diffchange-inline">. See also '''Switch'''</ins>.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''Interleaving''' - A technique for improving the quality of a connection which is subject to interference. The data stream is separated into small packets and rearranged together with error correction procedures. This reduces the error rate but increases the latency ('ping') of the connection. See [http://www.kitz.co.uk/adsl/interleaving.htm Interleaving explained]. See also '''Fastpath'''.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''Interleaving''' - A technique for improving the quality of a connection which is subject to interference. The data stream is separated into small packets and rearranged together with error correction procedures. This reduces the error rate but increases the latency ('ping') of the connection. See [http://www.kitz.co.uk/adsl/interleaving.htm Interleaving explained]. See also '''Fastpath'''.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''Local loop''' - The connection between the telephone exchange and the customer's premises.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''Local loop''' - The connection between the telephone exchange and the customer's premises.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''MAC address''' - See '''MAC'''(2)</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''MAC address''' - See '''MAC'''(2)</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>* '''Microfilter''' - Also known as 'ADSL filter', 'DSL filter' or 'Splitter'. A device which plugs into a telephone socket and separates the voice signals from the DSL signals. The voice side has a low-pass filter which blocks frequencies over about 5 kHz, and the DSL side is unfiltered.</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* '''Microfilter''' - Also known as 'ADSL filter', 'DSL filter' or 'Splitter'. A device which plugs into a telephone socket and separates the voice signals from the DSL signals. The voice side has a low-pass filter which blocks frequencies over about 5 kHz, and the <ins class="diffchange diffchange-inline">'''</ins>DSL<ins class="diffchange diffchange-inline">''' </ins>side is unfiltered.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''Modem''' - Modulator/demodulator. A device which enables digital data to be carried over an analogue link. Outgoing digital data is modulated onto an analogue signal and transmitted along a telephone line (typically); incoming analogue signals from the telephone line are demodulated in order to reconstruct their digital content. For a link to work in this way, there must be compatible modems, or equivalent functionality, at both ends of the link.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''Modem''' - Modulator/demodulator. A device which enables digital data to be carried over an analogue link. Outgoing digital data is modulated onto an analogue signal and transmitted along a telephone line (typically); incoming analogue signals from the telephone line are demodulated in order to reconstruct their digital content. For a link to work in this way, there must be compatible modems, or equivalent functionality, at both ends of the link.</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>* '''Modem/router''' - A device which combines a DSL modem and a router in a single package. Most modem/routers also include a network switch and a firewall, to make them into an all-in-one solution for internet access.</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* '''Modem/router''' - A device which combines a <ins class="diffchange diffchange-inline">'''</ins>DSL<ins class="diffchange diffchange-inline">''' </ins>modem and a router in a single package. Most modem/routers also include a network <ins class="diffchange diffchange-inline">'''</ins>switch<ins class="diffchange diffchange-inline">''' </ins>and a firewall, to make them into an all-in-one solution for internet access.</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>* '''Noise margin''' - The amount by which the SNR exceeds a specified base level of SNR. In a DSL connection, the base level of SNR is the level below which a stable connection is not likely to be possible.</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* '''Noise margin''' - The amount by which the <ins class="diffchange diffchange-inline">'''</ins>SNR<ins class="diffchange diffchange-inline">''' </ins>exceeds a specified base level of SNR. In a <ins class="diffchange diffchange-inline">'''</ins>DSL<ins class="diffchange diffchange-inline">''' </ins>connection, the base level of SNR is the level below which a stable connection is not likely to be possible.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''Powerline adaptor''' - See '''Homeplug'''.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''Powerline adaptor''' - See '''Homeplug'''.</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>* '''Ringwire''' - <del class="diffchange diffchange-inline">Part of </del>the cable which connects the master socket to extension sockets. The ringwire carries the telephone ringer signal, which is generated in the master socket. For the considerable majority of telephones the ringwire serves no purpose because the telephones generate their own ringer signal electronically, and it can often improve ADSL performance by [http://www.kitz.co.uk/adsl/socket.htm#ringwire disconnecting the ringwire].</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* '''Ringwire''' - <ins class="diffchange diffchange-inline">One conductor in </ins>the cable which connects the master socket to extension sockets. The ringwire carries the telephone ringer signal, which is generated in the master socket. For the considerable majority of telephones the ringwire serves no purpose because the telephones generate their own ringer signal electronically, and it can often improve ADSL performance by [http://www.kitz.co.uk/adsl/socket.htm#ringwire disconnecting the ringwire].</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>* '''Router''' - A device which passes packets of data between networks. A router steers data to the correct destinations as specified in the packet headers. The term 'router' is often used loosely to refer to a modem/router.</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* '''Router''' - A device which passes packets of data between networks. A router steers data to the correct destinations as specified in the packet headers. The term 'router' is often used loosely to refer to a <ins class="diffchange diffchange-inline">'''</ins>modem/router<ins class="diffchange diffchange-inline">'''</ins>.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''SNR margin''' - See '''Noise margin'''.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''SNR margin''' - See '''Noise margin'''.</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>* '''Switch''' - A networking device which performs the same function as a hub, but with some extra intelligence. It remembers the IP address of each connected device, and which port it's connected to, so it doesn't have to repeatedly poll the network.</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* '''Switch''' - A networking device which performs the same function as a <ins class="diffchange diffchange-inline">'''</ins>hub<ins class="diffchange diffchange-inline">'''</ins>, but with some extra intelligence. It remembers the IP address of each connected device, and which port it's connected to, so it doesn't have to repeatedly poll the network.</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>* '''Test socket''' - In an NTE5A master socket the faceplate can be removed to expose an internal socket into which you can plug a modem/router and/or telephone. As the extension sockets are wired into the removeable faceplate, this action disconnects all of the extensions, as an aid to diagnosis of problems. See [http://www.kitz.co.uk/adsl/troubleshooting.htm Trouble shooting].</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* '''Test socket''' - In an NTE5A master socket the faceplate can be removed to expose an internal socket into which you can plug a <ins class="diffchange diffchange-inline">'''</ins>modem/router<ins class="diffchange diffchange-inline">''' </ins>and/or telephone. As the extension sockets are wired into the removeable faceplate, this action disconnects all of the extensions, as an aid to diagnosis of problems. See [http://www.kitz.co.uk/adsl/troubleshooting.htm Trouble shooting].</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''Upstream''' - Refers to the movement of data away from the user towards a remote location.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''Upstream''' - Refers to the movement of data away from the user towards a remote location.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>== Abbreviations ==</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>== Abbreviations ==</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>* '''ADSL''' - Asymmetric Digital Subscriber Line. A protocol for broadband connections over telephone lines, in which greater provision is made for downstream data transfer than upstream.</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* '''ADSL''' - Asymmetric Digital Subscriber Line. A protocol for broadband connections over telephone lines, in which greater provision is made for <ins class="diffchange diffchange-inline">'''</ins>downstream<ins class="diffchange diffchange-inline">''' </ins>data transfer than <ins class="diffchange diffchange-inline">'''</ins>upstream<ins class="diffchange diffchange-inline">'''</ins>.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''ADSL2, ADSL2+''' - Extended versions of ADSL. See [http://en.wikipedia.org/wiki/Asymmetric_digital_subscriber_line#ADSL_standards Wikipedia article].</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''ADSL2, ADSL2+''' - Extended versions of ADSL. See [http://en.wikipedia.org/wiki/Asymmetric_digital_subscriber_line#ADSL_standards Wikipedia article].</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''ATM''' - Asynchronous Transfer Mode. A switching protocol which is designed to unify telecommunication and computer networks. Data is encoded into small fixed-sized cells, and combined using time division multiplexing.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''ATM''' - Asynchronous Transfer Mode. A switching protocol which is designed to unify telecommunication and computer networks. Data is encoded into small fixed-sized cells, and combined using time division multiplexing.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''dB''' - Decibel. A measure of gain or loss in a system. See [[Decibels|Decibels in the context of ADSL]]</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''dB''' - Decibel. A measure of gain or loss in a system. See [[Decibels|Decibels in the context of ADSL]]</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''DSL''' - Digital Subscriber Line. A generic name for a group of technologies which enable the transmission of digital data over a telephone line.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''DSL''' - Digital Subscriber Line. A generic name for a group of technologies which enable the transmission of digital data over a telephone line.</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>* '''DSLAM''' - Digital Subscriber Line Access Multiplexer. A network device, usually housed in a telephone exchange, which connects multiple user DSL interfaces into the high speed ATM backbone. See [http://www.kitz.co.uk/adsl/equip.htm How ADSL works].</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* '''DSLAM''' - Digital Subscriber Line Access Multiplexer. A network device, usually housed in a telephone exchange, which connects multiple user <ins class="diffchange diffchange-inline">'''</ins>DSL<ins class="diffchange diffchange-inline">''' </ins>interfaces into the high speed <ins class="diffchange diffchange-inline">'''</ins>ATM<ins class="diffchange diffchange-inline">''' </ins>backbone. See [http://www.kitz.co.uk/adsl/equip.htm How ADSL works].</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''FTTC''' - Fibre To The Cabinet. A hybrid arrangement for telephone lines; fibre-optic cable links the exchange to street cabinets, and copper cable links the cabinets to user premises. Used for BT Infinity and similar offerings from other ISPs.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''FTTC''' - Fibre To The Cabinet. A hybrid arrangement for telephone lines; fibre-optic cable links the exchange to street cabinets, and copper cable links the cabinets to user premises. Used for BT Infinity and similar offerings from other ISPs.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''FTTP''' - Fibre To The Premises. Fibre-optic cable links the exchange directly to user premises.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''FTTP''' - Fibre To The Premises. Fibre-optic cable links the exchange directly to user premises.</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>* '''ISDN''' - Integrated Services Digital Network. A set of standards for simultaneous digital transmission of voice, video, data and other services over a telephone line. Used in some countries for internet access, but largely superseded by DSL.</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* '''ISDN''' - Integrated Services Digital Network. A set of standards for simultaneous digital transmission of voice, video, data and other services over a telephone line. Used in some countries for internet access, but largely superseded by <ins class="diffchange diffchange-inline">'''</ins>DSL<ins class="diffchange diffchange-inline">'''</ins>.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''LAN''' - Local Area Network. A network of computers and associated devices which is entirely within a limited area, such as a house, school or office building.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''LAN''' - Local Area Network. A network of computers and associated devices which is entirely within a limited area, such as a house, school or office building.</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>* '''LLU''' - Local Loop Unbundling. An ISP installs its own equipment in a telephone exchange to process ADSL traffic. See '''MPF''' and '''SMPF'''.</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* '''LLU''' - Local Loop Unbundling. An ISP installs its own equipment in a telephone exchange to process <ins class="diffchange diffchange-inline">'''</ins>ADSL<ins class="diffchange diffchange-inline">''' </ins>traffic. See '''MPF''' and '''SMPF'''.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''MAC'''(1) - Migration Access Code. A code number which enables a customer to migrate from one ISP to another in a seamless fashion. The losing ISP gives the code to the customer, who then gives it to the new ISP. After that, the new ISP manages the changeover.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''MAC'''(1) - Migration Access Code. A code number which enables a customer to migrate from one ISP to another in a seamless fashion. The losing ISP gives the code to the customer, who then gives it to the new ISP. After that, the new ISP manages the changeover.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''MAC'''(2) - Media Access Control. A MAC address is a globally unique reference number for a network device. The number is most commonly allocated by the device manufacturer and stored in a read-only memory in the device or in its firmware.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''MAC'''(2) - Media Access Control. A MAC address is a globally unique reference number for a network device. The number is most commonly allocated by the device manufacturer and stored in a read-only memory in the device or in its firmware.</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>* '''MPF''' - Metallic Path Facility. A form of '''LLU''' in which the ISP takes over responsibility for voice operations as well as ADSL. Also known as "Full unbundling".</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* '''MPF''' - Metallic Path Facility. A form of '''LLU''' in which the ISP takes over responsibility for voice operations as well as ADSL. Also known as "Full unbundling"<ins class="diffchange diffchange-inline">. See also '''SMPF'''</ins>.</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>* '''MSAN''' - Multi-Service Access Node. A network device, usually housed in a telephone exchange, which connects users' telephone lines to the core network. Combines several different types of service, such as telephone, ISDN and DSL, into a single port.</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* '''MSAN''' - Multi-Service Access Node. A network device, usually housed in a telephone exchange, which connects users' telephone lines to the core network. Combines several different types of service, such as telephone, <ins class="diffchange diffchange-inline">'''</ins>ISDN<ins class="diffchange diffchange-inline">''' </ins>and <ins class="diffchange diffchange-inline">'''</ins>DSL<ins class="diffchange diffchange-inline">'''</ins>, into a single port.</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>* '''NAS''' - Network Attached Storage. An external hard disk storage device which connects to a LAN, providing shared storage facilities for computers and other devices on the LAN.</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* '''NAS''' - Network Attached Storage. An external hard disk storage device which connects to a <ins class="diffchange diffchange-inline">'''</ins>LAN<ins class="diffchange diffchange-inline">'''</ins>, providing shared storage facilities for computers and other devices on the LAN.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''POTS''' - Plain Old Telephone Service. The basic analogue voice telephone service.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''POTS''' - Plain Old Telephone Service. The basic analogue voice telephone service.</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>* '''SDSL''' - Symmetric Digital Subscriber Line. A protocol for broadband connections over telephone lines, in which equal provision is made for downstream and upstream data transfer.</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* '''SDSL''' - Symmetric Digital Subscriber Line. A protocol for broadband connections over telephone lines, in which equal provision is made for <ins class="diffchange diffchange-inline">'''</ins>downstream<ins class="diffchange diffchange-inline">''' </ins>and <ins class="diffchange diffchange-inline">'''</ins>upstream<ins class="diffchange diffchange-inline">''' </ins>data transfer.</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>* '''SMPF''' - Shared Metallic Path Facility. A form of '''LLU''' in which the ISP takes over the handling of ADSL traffic, but BT retains responsibility for voice traffic.</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* '''SMPF''' - Shared Metallic Path Facility. A form of '''LLU''' in which the ISP takes over the handling of <ins class="diffchange diffchange-inline">'''</ins>ADSL<ins class="diffchange diffchange-inline">''' </ins>traffic, but BT retains responsibility for voice traffic<ins class="diffchange diffchange-inline">. See also '''MPF'''</ins>.</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>* '''SNR''' - Signal to Noise Ratio. The signal level divided by the noise (interference) level. Usually expressed in dB.</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* '''SNR''' - Signal to Noise Ratio. The signal level divided by the noise (interference) level. Usually expressed in <ins class="diffchange diffchange-inline">'''</ins>dB<ins class="diffchange diffchange-inline">'''</ins>.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''VDSL''' - Very-high-bit-rate Digital Subscriber Line. A protocol for broadband connections over telephone lines, coaxial or fibre-optic cable.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''VDSL''' - Very-high-bit-rate Digital Subscriber Line. A protocol for broadband connections over telephone lines, coaxial or fibre-optic cable.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''VDSL2''' - Very-high-speed Digital Subscriber Line 2. An enhanced version of VDSL, currently being employed on BT FTTC lines.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''VDSL2''' - Very-high-speed Digital Subscriber Line 2. An enhanced version of VDSL, currently being employed on BT FTTC lines.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''WAN''' - Wide Area Network. A telecommunications network which covers a broad area and links together several localities.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* '''WAN''' - Wide Area Network. A telecommunications network which covers a broad area and links together several localities.</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>* '''Wi-Fi''' or '''WiFi''' - A means of linking together electronic devices by wireless. Can be used within a LAN or to connect to a WAN by means of a hotspot. "Wi-Fi" is a trade mark of the [http://www.wi-fi.org/ Wi-Fi Alliance].</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* '''Wi-Fi''' or '''WiFi''' - A means of linking together electronic devices by wireless. Can be used within a <ins class="diffchange diffchange-inline">'''</ins>LAN<ins class="diffchange diffchange-inline">''' </ins>or to connect to a <ins class="diffchange diffchange-inline">'''</ins>WAN<ins class="diffchange diffchange-inline">''' </ins>by means of a hotspot. "Wi-Fi" is a trade mark of the [http://www.wi-fi.org/ Wi-Fi Alliance].</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>* '''WLAN''' - Wireless Local Area Network. A LAN in which the devices are attached by wireless connections (normally Wi-Fi).</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* '''WLAN''' - Wireless Local Area Network. A <ins class="diffchange diffchange-inline">'''</ins>LAN<ins class="diffchange diffchange-inline">''' </ins>in which the devices are attached by wireless connections (normally Wi-Fi).</div></td></tr>
</table>Roseway