TalkTalk Wholesale Line Profiles: Difference between revisions

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~~[[File:Internet.png\|link=:Category:TalkTalk_Wholesale]]~~ 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== ~~==More Features Coming Soon==~~ The fastpath (non-interleaved) profiles are more likely to drop on a noise burst than the interleaved profiles We will be improving the Profile settings in the near future by making it easer to select and choose the correct profile for your line. Including making the Profile more readable and offering suggestions as to what profile to choose to do certain things. ==How long does a profile change take?== ==Understanding the Profile Names==▼ 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, it was successful then it will say Done: ===Annex A Line Profiles===▼ [[File:Tt-profile-changed.png]] ▲==Understanding the Profile Names== [[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]] ▲===Annex A Line Profiles=== Annex A line profiles are of the form: XYYY_SNR_DDD_UUU_Protocol F indicates that interleaving hasn’t been applied and that this is a fast profile. I followed by a number indicates the size of the interleaving delay. The greater the number the greater the interleaving applied. SNR denotes the target Signal to Noise Margin. ~~Where this is a single number, this number indicates the target for both upstream and downstream, where there are two, the first indicates downstream and the second indicates upstream.~~ Where this is a single number, this number indicates the target for both upstream and downstream 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 6dB.▼ 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 6dB.~~ *Note: Some fixed profiles omit the SNR property from their name, where this is the case their target margin is 6 dB. DDD indicates the maximum download speed. UUU indicates the maximum upload speed. Protocol indicates if the profile is tied to a specific ADSL protocol. Where this is negated, the profile will negotiate with the CPE starting at ADSL2+ and working down to G.DMT. ===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 MInpN denotes the Impulse Noise Protection values. Where this is set to 0 there is in none, else the values are that for Downstream followed by upstream, H denotes 1⁄2 a tone. ===Diagnostic Profiles=== There are a few diagnostic profiles that can be used to isolate faults. ==View the Profile list== We have a table of all the available profiles, [[TalkTalk Wholesale Line Profiles List\|See here]] =Profile Factors= ==SNR== SNR is a measure of signal strength and as such is measured in Decibels (dB). The values in use on the ~~TTT~~TTW network are: 6 dB 6dB 9 dB 9dB 12 dB 12dB 15 dB 15dB ~~(We have requested 3dB, but it's not available yet)~~ ==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 ~~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~~are ~~back~~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~~''error ~~Correction~~correction''. Interleaving can be used as a form more robust form of error correction. The ~~‘Delay’~~‘delay’ of the ~~Interleaving~~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: Off (~~Fast~~fast) 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]]