Am 21.09.2011 23:34, schrieb Vlad Baranovsky: > Hello, > > I have a question regarding codec negotiation between a Mac OS > PjSip-based client and Counterpath's X-lite. I've tried the scenario > with both the 1.10 and 2.0 versions of PjSip. I'm using version 4.1 of > the X-lite client. The scenario is as follows: > > 1. Initiate call from PjSip client to X-Lite client > 2. PjSip offers list of supported codecs > 3. X-Lite responds with acceptable codecs (note multiple) > 4. PjSip attempts to update the session to use only one codec > 5. X-Lite continues to respond with a list > 6. Steps 4-5 are repeated until session is disconnected. > > Note that if either X-Lite or Pjsip are configured to use only one > codec, this does not happen and everything works as expected. Below is a > PjSip log snippet showing the offer/response loop.. Am I doing > something wrong here? Is there a bug in X-Lite or PjSip? Any suggestions > would be very much appreciated. The trace shows overlapping reINVITEs/UPDATE with retransmissions of the UPDATE request. Thus, yes there is a problem in the trace but it seems different to the problem you described. regards klaus