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This is the support site for Andrews & Arnold Ltd, a UK Internet provider. Information on these pages is generally for our customers but may be useful to others, enjoy!

TalkTalk Wholesale Line Profiles: Difference between revisions

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=Understanding the Profile Names=
=Understanding the Profile Names=
[[File:Tt-profile.png|link=TalkTalk_Wholesale_Line_Profiles_List]]
[[File:Tt-profile.png|link=TalkTalk Wholesale Line Profiles List]]
*We have a table of all the available profiles, [[TalkTalk Wholesale Line Profiles List|See here]]
*We have a table of all the available profiles, [[TalkTalk Wholesale Line Profiles List|See here]]


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==SNR==
==SNR==


SNR is a measure of signal strength and as such is measured in Decibels (dB). The values in use on the TTT network are:
SNR is a measure of signal strength and as such is measured in Decibels (dB). The values in use on the TTW network are:
*6 dB
*6 dB
*9 dB
*9 dB
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*15 dB
*15 dB


==3dB==
3 dB should be available by 2014. Customers could try configuring their modem to force a 3 dB profile, but this is not officially supported. (e.g. a Billion 7800DXL does this)

3 dB is now supported! As of November 2015 customers can request a 3 dB profile. The process is a little long winded, but once a Support staff member picks up the task 3 dB can be applied within a few minutes. Do contact us.


==Interleaving, Error Correction and Delay==
==Interleaving, Error Correction and Delay==
Packets of data that are transferred across a DSL line are split down into smaller blocks of data; these are then sent sequentially sent across the DSL line. As they arrive at the receiving end, they reconstructed back into the original larger packets of data.
Packets of data that are transferred across a DSL line are split into smaller blocks of data; these are then sent sequentially sent across the DSL line. As they arrive at the receiving end, they are recombined into the original larger packets of data.


If one block of a larger packet is lost due to line interference, the packet can be recreated using the remaining blocks that were received; data blocks reserve some space for data which can salvage a partially damaged block. This is known as Error Correction. Interleaving can be used as a form more robust form of error correction.
If one block of a larger packet is lost due to line interference, the packet can be recreated using the remaining blocks that were received; data blocks reserve some space for data which can salvage a partially damaged block. This is known as ''error correction''. Interleaving can be used as a form more robust form of error correction.


The ‘Delay’ of the Interleaving is simply a measurement of the size of the interleaving buffers. The size is measured in
The ‘delay’ of the interleaving is simply a measurement of the size of the interleaving buffers. The size is measured in milliseconds (ms).
Milliseconds (ms).


The buffer sizes available on the TalkTalk network are:
The buffer sizes available on the TalkTalk network are:
*Off (Fast)
*Off (fast)
*8ms
*8ms
*16ms
*16ms
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[[Category:TalkTalk Wholesale]]
[[Category:TalkTalk Wholesale]]
[[Category:Line_Profiles]]
[[Category:Line Profiles]]
Retrieved from "http://support.aa.net.uk/TalkTalk_Wholesale_Line_Profiles"