INVITE sip:schooler@cs.caltech.edu SIP/2.0Via: SIP/2.0/UDP csvax.cs.caltech.edu;branch=8348;maddr=239.128.16.254;ttl=16Via: SIP/2.0/UDP north.east.isi.eduFrom: Mark Handley <sip:mjh@isi.edu>To: Eve Schooler <sip:schooler@caltech.edu>Call-ID: 2963313058@north.east.isi.eduCSeq: 1 INVITESubject: SIP will be discussed, tooContent-Type: application/sdpContent-Length: 188v=0o=user1 53655765 2353687637 IN IP4 128.3.4.5s=Mbone Audioi=Discussion of Mbone Engineering Issuese=mbone@somewhere.comc=IN IP4 224.2.0.1/127t=0 0m=audio 3456 RTP/AVP 0