The following problem relates to several JIRA issues involving Skype and the SMC phone.
Skype sends an INVITE (SDP) to the smc phone. The SMC phone returns multiple codec choices in the 200 OK for the response. This completely confuses the Skype SIP trunk. I made numerous tries to compensate for this using re-INVITEs so as to make it dynamic and end to end but nothing completely worked for all scenarios. I am wondering if the right strategy would be as follows: Skype sends an SDP offer to the SMC phone. Let A be the set of codecs in the OFFER. Let B be the set of codecs in the Answer. SipXbridge computes the intersection of A and B and picks a single codec from that intersection to send as an answer back to Skype. This is not the same thing as clamping down the codecs or using a predefined exclude list but I think it will solve the interoperability issue with skype. Would this be a good thing for sipxbridge to implement? Regards, Ranga. -- M. Ranganathan
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