asterisk users - Feb 2007 - 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,
> 
> Chris
Hi,

not really a pearl of wisdom, but using JB on IAX with trunking seems to cause a
few problems.

-- 
thanks,
Yusuf