asterisk users - Mar 2007 - Issues with a Linksys SPA 2102 and asterisk

Topology:
analog_phone-----SPA2102-----Navini_Wireless_Router------ISP------Asterisk
A ping against the asterisk server shows aprox 145ms roundtrip.
128kbps upstream
512kbps downstream
g729a as codec
signal quality of the navini router: 100%

The ATA operates correctly in every form, however sometimes when
someone is talking to me (the other person is at pstn) and then I
start talking the other end receives garbled voice and i need to start
talking again. So I played with the jitter buffers in the available
modes (low, medium, high) (direction upward, downward both) and it
seems i cannot improve my voice experience.

Any gurus out there with experience with the SPA 2102 against asterisk 1.2.14?

thanks,


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Erick Perez

> Any gurus out there with experience with the SPA 2102 against asterisk
1.2.14?
They work fine with Asterisk; most likely it's your wireless link
that's the cause of your problem. The jitter buffer will only affect
received audio, i.e. on your side, and since that is fine, you
probably don't need to adjust it. Instead try this:

1) Change packet size in increments of 20 ms (i.e. 0.02, 0.04 or
perhaps 0.06). Your wireless link may not like too many small packets.

2) Turn off silence suppression if it's on.

3) Try a different codec -- g726-32 or even ulaw to see if it makes a
difference.

See if that helps.

--Luki