#16 Neither accepting or denying audio in SDP

[Andreas Piirimets]

When offering PCMU and telephone-event together with
video and text codecs to SIPcon1, it will not mention
the audio media at all in the SDP answer.

Offer to SIPcon1 (in INVITE):

m=audio 6000 RTP/AVP 0 98
a=fmtp:98 0-15
a=rtpmap:0 PCMU/8000
a=rtpmap:98 telephone-event/8000
m=video 8000 RTP/AVP 96 34 31
a=fmtp:96 CIF=1 QCIF=1/MaxBR=3160/I J K T
a=fmtp:34 CIF=1 QCIF=1/MaxBR=3160
a=fmtp:31 CIF=1 QCIF=1/MaxBR=3160
a=rtpmap:96 H263-1998/90000
a=rtpmap:34 H263/90000
a=rtpmap:31 H261/90000
m=text 11000 RTP/AVP 98
a=rtpmap:98 T140/1000

Answer from SIPcon1 (in 200 OK):

m=video 0 RTP/AVP 96 34 31
m=text 10000 RTP/AVP 98
a=rtpmap:98 T140/1000

Yes, the offer is somewhat strange since payload
number 98 is used twice but for different media. But the
interesting aspect is that SIPcon1 is denying video but
quiet about audio.