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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!
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With TalkTalk Wholesale ADSL circuits we (and customers) have full control over the line profile. By default we disable DLM, and are able to set the profile manually.
On the control pages for the Line we have the profiles selection:
[[File:Tt-profile-list.png|none|frame|Profile options on the Control Pages]]
To change the profile, select the one you like, and then press Profile to make the change. It will just take a few seconds to apply, and the line will resync.
The reverse of these is also true, if your line cannot support a profile selected.
==Notes==
*The fastpath (non-interleaved) profiles are more likely to drop on a noise burst than the interleaved profiles
==How long does a profile change take?==
Not long! The profile change is set through to TalkTalk Wholesale as soon as you click the button on the control page, and the line will resync within a minute. If the profile change failed, then the log will say failed,
[[File:Tt-profile-changed.png]]
=Understanding the Profile Names=
[[File:Tt-profile.png|link=
*We have a table of all the available profiles, [[TalkTalk Wholesale Line Profiles List|See here]]
**Where there are two, the first indicates downstream and the second indicates upstream.
**The lower the number the greater the achievable line rate, the higher the number the higher the number then the lower the achievable line rate.
**Note: Some fixed profiles omit the SNR property from their name, where this is the case their target margin is
*DDD indicates the maximum download speed.
*UUU indicates the maximum upload speed.
==Annex M line profiles==
AnnexM profiles are available to customers with the 'Premium' option on their service.
Annex M line profiles are of the form:
MXYYY_SNR_DDD_UUU:MInpN
==SNR==
SNR is a measure of signal strength and as such is measured in Decibels (dB). The values in use on the
*6 dB
*9 dB
*12 dB
*15 dB
==3dB==
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==
Packets of data that are transferred across a DSL line are split
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
The
The buffer sizes available on the TalkTalk network are:
*Off (
*8ms
*16ms
The fastpath (non-interleaved) profiles are more likely to drop on a noise burst than the interleaved profiles
==Impulse Noise Protection==
[[Category:TalkTalk Wholesale]]
[[Category:Line Profiles]]
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