<status> <basic>closed</basic> </status> </tuple> </presence> SIP/2.0 200 OK Via SIP/2.0/TCP dist.probablilty.org: 5060 ;branch=z9hG4bK4321;received=24.32.1. To: P. L. Chebychev<sip:chebychev@academy.ru>;tag=21171 From: M. Poisson <sip:poisson@probability.org>;tag=25140 Call-ID: 58dkfj349241k34452k592520 CSeq: 1026 NOTIFY Content-Length: 0 NOTIFY sip:pafnuty@lecturehal121.academy.ruSIP/2.0 Via SIP/2.0/TCP dist.probablilty.org:5060 ; branch=z9hG4bK334241 Max-Forwards: 70 To: P. L. Chebychev <sip:chebychev@academy.ru>;tag=21171 From: M. Poisson <sip:poisson@probability.org>;tag=25140 Call-ID: 58dkfj349241k34452k592520 CSeq: 1027 NOTIFY SIP: Understanding the Session Initiation Protocol Allow: ACK, INVITE, CANCEL, BYE, NOTIFY, SUBSCRIBE, MESSAGE Allow-Events: presence Contact: sip:s.possion@dist.probability.org;transport=tcp> Subscription-State: active;expires=1800 Event: presence Content-Type: application/cpim-pidf+xml Content-Length: 325 <?xml version="1.0" encoding="UTF-8"?> <presence xmlns="urn:ietf:params:xml:ns:cpim-pidf" entity="sip:poisson@probability.org"> <tuple id="452426775"> <status> <basic>open</basic> </status> <contact>sip:s.possion@dist.probability.org;transport=tcp </contact> </tuple> </presence> SIP/2.0200 OK ViaSIP/2.0/TCP dist.probablilty.org: 5060 ;branch=z9hG4bK334241;received=24.32.1.3 To: P. L. Chebychev k<sip:chebychev@academy.ru>;tag=211 From: M. Poisson k<sip:poisson@probability.org>;tag=25140 Call-ID: 58dkfj349241k34452k592520 CSeq: 1027 NOTIFY Content-Length: 0 MESSAGE sip:s.possion@dist.probability.or SIP/2.0 Via SIP/2.0/TCP Lecturehall21.academy.ru:5060 ;branch=z9hG4bk3gtr2 Max-Forwards: 70 To: M. Poisson <sip:s.possion@dist.probability.org> From: P. L. Chebychev<sip:chebychev@academy.ru>;tag=4542 Call-ID: 9dkei93vjg1ei3 CSeq: 15 MESSAGE Allow: ACK, INVITE, CANCEL, BYE, NOTIFY, SUBSCRIBE, MESSAGE Content-Type: text/plain Content-Length: 9 Hi There! SIP/2.0 200 OK Via SIP/2.0/TCP lecturehall21.academy.ru:5060 branch=z9hG4bk3gtr2;received=19.34.3.1 To: M. Poisson<sip:s.possion@dist.prob