[Iaxclient-devel] Bad audio on IAX Phone <--> Cisco 7960 Call?

[Steven S. <ss...@so...>]

I seem to have hit a problem with calls between users on IAX Phone and 
the popular (and expensive) Cisco 7960.  The audio quality is TERRIBLE.  
Broken up, ragged sounding.  It makes no difference which codecs I use 
on either end (this is an experimental version of IAX Phone with 
multiple codecs).  The same problem seems to occur with iaxComm and 
Firefly as well.

It ONLY appears to happen with the Cisco.  My other SIP phones (a 
Grandstream BT101, a Uniden, an ACT, a Sipura and an ariaVoice) all work 
just fine with the incoming audio stream from an IAX Client device.

It also appears to be a problem with iaxClient calls, as IAX2 calls 
Asterisk-to-Asterisk sound fine.

Can anybody else out there with a Cisco 7960 set up and test this?  
Here's my current configuration:

Cisco 7960 w/ SIP Image 7.1.00
Asterisk Stable-1.0.1
IAX Phone (any version) or iaxComm soft phone

Please let me know if you've seen this before or if you can reproduce it.

Thanks,

Steve

P.S. - A multi-codec version of IAX Phone will be out soon.