I receive a SDP from my carrier with this line: v=0\n o=IWSPM 649379888 649379888 IN IP4 66.14.6.146\n s=-\n c=IN IP4 66.14.6.146\n t=0 0\n m=audio 56632 RTP/AVP 18 8 0 101\n a=ptime:20\n a=rtpmap:101 telephone-event/8000\n a=fmtp:101 0-15\n m=image 45526 udptl t38\n a=T38FaxUdpEC:t38UDPRedundancy\n and Twinkle sends this SDP in the 200 OK:
v=0 o=twinkle 1625925560 2129493754 IN IP4 192.168.1.58 s=- c=IN IP4 88.99.3.10 t=0 0 m=audio 60322 RTP/AVP 8 101 a=rtpmap:8 PCMA/8000 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-15 a=ptime:20 m=image 0 NULL a=T38FaxUdpEC:t38UDPRedundancy Inmediatelly the carrier (a Nortel CS2K) sends me a BYE. I suspect that those lines in Twinkle's SDP are not valid: m=image 0 NULL <--------- NULL ??? a=T38FaxUdpEC:t38UDPRedundancy Reading RFC 4566 (SDP) I find nothing about NULL, also in RFC 3362 (Real-time Facsimile (T.38) - image/t38). Is valid this line? m=image 0 NULL Thanks a lot. -- Iñaki Baz Castillo [EMAIL PROTECTED] _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
