[Asterisk-Users] codec introducing huge latency

[Andrew Kohlsmith]

On April 14, 2005 06:34 pm, chawki hammoud wrote:
> I previously posted about the huge latency introduced
> by iax2. It is a problem introduced by the codec. in
> iax2.conf, i disllowed=all and allow=gsm and the RTT
> is the same as I do ping shell command. When i change
> from gsm to ulaw or alaw, then i have the huge RTT and
> high jitter and evntually the call get disconnected.
> when i use gsm, the call doesn't get disconnected.
> of course, i like to use ulaw, for the internet
> bandwidth i have, ulaw quality is better.
> i have asterisk 1.0.6 and i wonder if the older
> version had the same codec problem.

It's not a codec problem, and it doesn't appear to be an asterisk problem.

Either you or the far side simply does not have the bandwidth to sustain the 
communications.  ulaw is about 80kbps, and gsm about 28-30kbps.

It really sounds like you need to review your network.

-A.