Quote:
Originally Posted by cybernetic_tiger
e interleaving turned off as this will cause retransmissions which intern will slow the connection.
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Turning interleaving off might not be a very good idea.
I'd only recommend that if you got a good line...
Interleaving does add to latency but thats because it helps to reduce the number of errors on the line and will actually REDUCE retransmissions as its able to reduce the number of packets that are corrupted and therefore need retransmitting.
Although I suppose with it off although you'd probably have a lower sync-rate the lower latency might benefit the voip
http://www.kitz.co.uk/adsl/interleaving.htm
Also Rate adaptive Dsl max should be ok down about 6db downstream SNR margin, if there to many errors the DSLAM should raise the target SNR profile automatically which would give a higher SNR at the expense of sync rate.
Is there anything else going over the ADSL line at the same time as the voip traffic, how many VOIP calls are going on at once, whats the codec being used?
Could it be a case of there isn't enough upstream bandwidth to do everything that they are trying to do at the same time...
Uploading a file for instance could disrupt the VOIP unless your using QOS to prioritize the Voip traffic