SUBSCRIBE sip me-list@chicago.handbook.com SIP/2.0 Via: SIP/2.0/TCP terminal.chicago.handbook.com pranch=z9hG4bKwYb6QREiCL © 2009 by Taylor & Francis Group, LLC SIP Handbook: Services, Technologies, and Security Max-Forwards 70 To: k<sip:me-list@Chicago.handbook.com> From: sip:me@chicago.handbook.com>;tag=ie4hbb8t Call-ID: cdB34qLToC@terminal.Chicago.handbook.com CSeq: 322723822 SUBSCRIBE Contact: sip:terminal.Chicago.handbook.com> Event: presence Expires: 7200 Supported: eventlist Accept: application/pidf+xml Accept: application/rlmi+xml Accept: multipart/related Accept: multipart/signed Accept: application/pkcs7-mime Content-Length: 0 M2: The local RLS completes the SUBSCRIBE transaction. Local RLS Terminal SIP/2.0 200 OK Via: SIP/2.0/TCP terminal.chicago.handbook.com/ ranch=z9hG4bKwYb6QREiCL To: <sip:me-list@Chicago.handbook.com>;tag=zpNctbZc From: <sip:me@chicago.handbook.com>;tag=ie4hbb8t Call-ID: cdB34qLToC@terminal.Chicago.handbook.com CSeq: 322723822 SUBSCRIBE Contact: <sip:Chicago.handbook.com> Expires: 7200 Require: eventlist Content-Length: 0 M3: the RLS sends a NOTIFY message immediately upon accepting the subscription. The NOTIFY contains an RLMI document describing the entire buddy list, as well as presence information for the users about which it already knows. Note that, since the RLS has not yet retrieved information for some of the entries on the list, those <resource> elements contain no <instance> elements. Local RLS -> Terminal NOTIFY sip:terminal.chicago.handbook.co SIP/2.0 Via: SIP/2.0/TCP chicago.handbook.com; branch=z9hG4bkMgRenTETmm Max-Forwards: 70 From: k<sip:me-list@chicago.handbook.com>;tag=z To: me@chicago.handbook.com>;tag=ie4hbb8t Call-ID: cdB34qLToC@terminal.chicago.handbook.com CSeq: 997935768 NOTIFY © 2009 by Taylor & Francis Group, LLC SIP Event Notification and Presence Information Contact: <sip:chicago.handbook.com> Event: presence Subscription-State: active;expires=7200 Require: eventlist Content-Type: multipart/related;type="application/rlmi+xml"; start="<nXYxAE@chicago.ha