Chris Bagnall
2007-Feb-14 05:46 UTC
[asterisk-users] To jitter buffer or not to jitter buffer?
Greetings list, Some time ago (probably about a year ago now) we disabled IAX jitter buffering on all our boxes because it was causing issues in a mixed 1.0 and 1.2 environment. One thing I've noticed over the last few months as more and more clients have moved from the 512k/1mb/2mb ADSL connections they were using onto "up to 8mb" connections is that whilst overall throughput is a lot better, the connections do seem to be more variable and have a tendency to stutter somewhat even with very little load on them. As a result, I'm considering reintroducing jitter buffering on our boxes now that everything's running 1.2 thoughout. Are there any pearls of wisdom out there on 1) whether enabling the jitter buffer is a good idea, and 2) what the recommended settings would be on an ADSL connection? I know that configuration is going to be a bit of a black art, as I'd imagine the "best" settings will be different for different users, but a starting point that folks have found working well over low-cost ADSL connections would be much appreciated. Thanks in advance. Regards, Chris -- C.M. Bagnall, Director, Minotaur I.T. Limited This email is made from 100% recycled electrons
Chris Bagnall wrote:> Greetings list, > > Some time ago (probably about a year ago now) we disabled IAX jitter > buffering on all our boxes because it was causing issues in a mixed 1.0 and > 1.2 environment. > > One thing I've noticed over the last few months as more and more clients > have moved from the 512k/1mb/2mb ADSL connections they were using onto "up > to 8mb" connections is that whilst overall throughput is a lot better, the > connections do seem to be more variable and have a tendency to stutter > somewhat even with very little load on them. > > As a result, I'm considering reintroducing jitter buffering on our boxes now > that everything's running 1.2 thoughout. > > Are there any pearls of wisdom out there on 1) whether enabling the jitter > buffer is a good idea, and 2) what the recommended settings would be on an > ADSL connection? > > I know that configuration is going to be a bit of a black art, as I'd > imagine the "best" settings will be different for different users, but a > starting point that folks have found working well over low-cost ADSL > connections would be much appreciated. > > Thanks in advance. > > Regards, > > ChrisHi, not really a pearl of wisdom, but using JB on IAX with trunking seems to cause a few problems. -- thanks, Yusuf
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