Interleaving: Difference between revisions
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<indicator name="Front">[[File:Menu-cog.svg|link=:Category:Line Settings|30px|Back up to the Broadband Line Settings]]</indicator> |
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==Availability== |
==Availability== |
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*BT 21CN Lines |
*BT 21CN Lines |
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*TT lines - via [[ |
*TT lines - via [[TalkTalk Wholesale Line Profiles|Adjusting the profile]] |
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==Interleaving Options== |
==Interleaving Options== |
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The downside is that, whilst the overall speed is the same, interleaving adds latency. Typically around 8ms is added to all communications on the line, though there are different levels of interleaving (or Impulse Noise Protection) which cause even higher latency. The latency added is however consistent, which can, in itself, be an important factor for on-line games. |
The downside is that, whilst the overall speed is the same, interleaving adds latency. Typically around 8ms is added to all communications on the line, though there are different levels of interleaving (or Impulse Noise Protection) which cause even higher latency. The latency added is however consistent, which can, in itself, be an important factor for on-line games. |
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This is a slight challenge: with interleaving the line has extra latency all the time, but without it you get errors. When there is an error then the packet has to be resent, which adds a lot more latency but randomly and inconsistently. Usually interleaving is a better choice, but it does depend |
This is a slight challenge: with interleaving the line has extra latency all the time, but without it you get errors. When there is an error then the packet has to be resent, which adds a lot more latency but randomly and inconsistently. Usually interleaving is a better choice, but it does depend on the interference. In some cases interference is only at certain times of day, and if that is not when you are playing, then interleaving is best turned off. |
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There is often one other option, which is running the line at a lower speed. This can remove the interference if it is only at certain frequencies, and as we explained above, the speed is not necessarily a key factor. |
There is often one other option, which is running the line at a lower speed. This can remove the interference if it is only at certain frequencies, and as we explained above, the speed is not necessarily a key factor. |
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== Good or bad? == |
== Good or bad? == |
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Interleaving on lines where |
Interleaving on lines where it can reduce errors can be a good thing for applications such as VoIP. |
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Gamers will want to reduce the latency as much as possible. |
Gamers will want to reduce the latency as much as possible. |
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== TalkTalk lines == |
== TalkTalk lines == |
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The interleaving is set |
The interleaving is set by selecting the line profile, see: [[TalkTalk Wholesale Line Profiles|Adjusting the profile]] |
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==FTTC== |
==FTTC== |
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Interleaving on a VDSL/FTTC line is managed by Openreach. It is very hard for us to persuade BT or TalkTalk to disable or enable interleaving as this requires an engineer visit and a DLM reset. This is not a service they offer. VDSL comes with interleaving automatically managed by Openreach and there is no option for us to request changes. Both BT and TalkTalk are highly reluctant for us to specifically report a fault to disable interleaving. Please do discuss this with Support, but manually disabling interleaving is not really possible. |
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Controlling interleaving on a BT FTTC line is done by Openreach. It is quite hard for us to persuade BT to disable or enable interleaving. We can try though, so do ask. |
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[[Category:Line Profiles]] |
[[Category:Line Profiles]] |
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[[Category: |
[[Category:Line Settings]] |
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