Dear all,
I have a question regarding receiving INVITE which has both audio and image
mediadescriptor in its SDP. In this case, I don't know which mediadescriptor I
should take, and I am not even sure whether this is legal format or not.
Following is the sample incoming INVITE message that I received. If this is the
initial INVITE, am I supposed to ignore FAX thing and take audio only? What if
I receive this when I am trying to send FAX and the receiver side sends this
re-INVITE to switch over to T.38 mode? Is there any RFCs regarding this issue?
Looking forward to your answers.
INVITE sip:[EMAIL PROTECTED]:5060 SIP/2.0
FROM: <sip:[EMAIL PROTECTED]:5060;transport=tcp>;epid=765FF3B2D3;tag=9e148ff751
TO: <sip:[EMAIL
PROTECTED]:5060;transport=tcp>;tag=5614b60-afea878-13c4-50022-d4-47032be0-d4
CSEQ: 1 INVITE
CALL-ID: 55fde78-afea878-13c4-50022-d4-35449e22-d4
MAX-FORWARDS: 70
VIA: SIP/2.0/TCP 10.254.168.129:1593;branch=z9hG4bKfc5951b3
CONTACT:
<sip:exum.xxx.local:5065;transport=Tcp;maddr=10.254.168.129;ms-opaque=15a74095d736a37f>
CONTENT-LENGTH: 282
USER-AGENT: XXXX
CONTENT-TYPE: application/sdp
v=0
o=- 0 1 IN IP4 10.254.168.129
s=session
c=IN IP4 10.254.168.129
t=0 0
m=audio 6353 RTP/AVP 0 8 101 13
a=rtpmap:0 PCMU/8000/1
a=rtpmap:8 PCMA/8000/1
a=rtpmap:101 telephone-event/8000
m=image 1592 udptl t38
a=T38FaxRateManagement:transferredTCF
a=T38FaxUdpEC:t38UDPFEC
Sungwoo
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