The phone is a Polycom SoundPoint IP 301. I disabled all codecs other than G.729 on the phone's config page under Voice/Codecs--still no audio. The ITSP can't force G.711u. I'm not sure what else I can try.
-----Original Message----- From: Robert Joly [mailto:[email protected]] Sent: Thu 7/2/2009 1:14 PM To: Matt Keys; [email protected] Subject: RE: [sipx-users] ITSP call goes through but no audio This could very well be the problem if the SIP phone you use does not support asymmetric codecs nor does the lock-down procedure described in Section 10.2 of RFC3264. To prove it, reconfigure your phone's audio/rtp preferences to only use G.729. This will eliminate the possibility of codec asymmetry - if the call now works, you have your answer. bob
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