On Wed, 2009-03-11 at 20:58 -0400, M. Ranganathan wrote: > Possible Solutions: > > 1. I can hack the SDP going back to the ITSP in Frame 66 and add this > attribute hence working around the apparent bug in the Voice Mail > server. > > 2. I can hack the SDP returned from the re-INVITE OK to the ITSP ( > frame 35) and add this attribute. I dont know if the iTSP *should* > attach such an attribute in the offer. I am aware of at least one > other major ITSP that does not. > > 3. We can modify the current Voice Mail server to always add that attribute.
The SDP answer is allowed to contain codecs that the SDP offer did not include, and the answerer can receive media using those codecs. I think you're stuck with solution #3, because you have to make sure the VM server will actually decode DTMF using the codec number in question. You also have to make sure that codec number has never been used for another codec within this dialog by the VM server, so you need to know the SDP history of the dialog. Dale _______________________________________________ sipx-dev mailing list [email protected] List Archive: http://list.sipfoundry.org/archive/sipx-dev Unsubscribe: http://list.sipfoundry.org/mailman/listinfo/sipx-dev
