steve szmidt wrote:
> On Friday 26 October 2007, Chris Mathey wrote:
>> Hi,
>> I believe we have some other Asterisk users here so I figured I would
>> post this.
>> I have an IAX trunk between 2 Asterisk servers, I'll call them A and B.
>> Whenever there is a call placed over the trunk to connected stations the
>> audio from B is always choppy\garbled. Audio from "A" is always clear
>> from B's perspective.
>>
>> I've ruled out bandwidth\jitter\latency issues (SIP calls between A and
>> B are fine.)
>> Both Asterisk servers are also on dedicated underutilized hardware.
>> Both Asterisk servers do not have zaptel hardware and load ztdummy for
>> timing.
>> Any suggestions ?
>> Thanks!
>> -Chris
>
> Choppy & garbled indicates big lags in the network traffic. Basically lag over
> something like 250ms starts becoming noticeable. Check TOS (type of service)
> settings which can make a big difference. Network traffic can create these
> lags where packets are not delivered in time, causing the sound to become
> choppy and garbled.
>
> If you pass through any router see if it supports TOS.
>
I get consistent sub 40ms rtt between hosts. Also when the trunk is SIP
between the 2 hosts there is no issue (same codec g.711).
The choppy audio only comes from the B side. B side can hear me fine.
I'm leaning on some weird timing issue or as another suggestion the
jitterbuffer (which is enabled on both)
TIA!
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