On 01/24/2013 09:44 PM, Richard Kenner wrote:
[snip]
When I use alaw, the path from Asterisk to the Alcatel is completely
clean, but the other way has a set of clicks that kind of sound like
old-fashioned audio noise.
[snip]
It's been ages since I experienced that but things to check that come to
mind in no particular order are:
- DAHDI settings (sync source)
- Asterisk server not properly grounded
- timing is off (check logs)
- shared interrupts (make sure nic/TDM card have their own)
- jitterbuffer settings (try on/off)
- echo cancellation going bonkers (OSLEC?)
- QoS (proper priority for voice packets?)
- PCI slot (if you have a card, try changing the slot it's in)
Use Wireshark to see the difference between a good call and a bad one.
If you see a lot of time jumps on the bad call then look at your
network/QoS.
Regards,
Patrick
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