Hello, In response to a re-INVITE from the server, I am seeing sofia-sip (v 1.12.4) sending out a 200 OK SDP body that appears to be missing a field. Here are the details:
1) NUA sends outgoing INVITE (via nua_invite() with SOATAG_USER_SDP)
containing the following (as seen in Ethereal):
... (m): audio ...
... (a): rtpmap:18 G729/8000
... (a): rtpmap:0 G711/8000
... (a): rtpmap:96 telephone-event/8000/1
2) Server replies (via 200 OK) with SDP fields (as seen in Ethereal):
... (m): audio ...
... (a): rtpmap:0 PCMU/8000
... (a): rtpmap:96 telephone-event/8000
... (a): fmtp:96 0-16
... (a): silenceSupp:off - - - -
3) Server sends re-INVITE with SDP fields (as seen in Ethereal):
... (m): audio ...
... (a): rtpmap:0 PCMU/8000
... (a): rtpmap:96 telephone-event/8000
... (a): fmtp:96 0-16
... (a): silenceSupp:off - - - -
4) NUA replies (via nua_respond(200 "OK") and identical SOATAG_USER_SDP
as original INVITE), but this is what I see in outgoing 200 OK SDP
body in Ethereal:
... (m): audio ...
... (a): rtpmap:96 telephone-event/8000/1
The outgoing 200 OK should also contain either
... (a): rtpmap:0 PCMU/8000
or
... (a): rtpmap:0 G711/8000
I have a Polycomm phone that I am comparing this with. Do you know why this
field is missing?
Best Regards,
Jerry
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