{"draft":"draft-ietf-bliss-call-completion-19","doc_id":"RFC6910","title":"Completion of Calls for the Session Initiation Protocol (SIP)","authors":["D. Worley","M. Huelsemann","R. Jesske","D. Alexeitsev"],"format":["ASCII","HTML"],"page_count":"37","pub_status":"PROPOSED STANDARD","status":"PROPOSED STANDARD","source":"Basic Level of Interoperability for SIP Services","abstract":"The \"completion of calls\" feature defined in this specification\r\nallows the caller of a failed call to be notified when the callee\r\nbecomes available to receive a call.\r\n\r\nFor the realization of a basic solution without queuing, this\r\ndocument references the usage of the dialog event package (RFC 4235)\r\nthat is described as 'Automatic Redial' in \"Session Initiation                           \r\nProtocol Service Examples\" (RFC 5359).\r\n\r\nFor the realization of a more comprehensive solution with queuing,\r\nthis document introduces an architecture for implementing these\r\nfeatures in the Session Initiation Protocol where \"completion of                         \r\ncalls\" implementations associated with the caller's and callee's\r\nendpoints cooperate to place the caller's request for completion of\r\ncalls into a queue at the callee's endpoint; when a caller's request\r\nis ready to be serviced, re-attempt of the original, failed call is\r\nthen made.\r\n\r\nThe architecture is designed to interoperate well with existing\r\ncompletion of calls solutions in other networks.","pub_date":"April 2013","keywords":["call completion","CC","SS7","Signaling System 7","purpose header parameter","m URI parameter","m header parameter","call-completion event package","\u00c2\u00a0CCBS","CCNR","CCNL","Call-Info header field","Presence Information Data Format","PIDF","P-Asserted-Identity header field"],"obsoletes":[],"obsoleted_by":[],"updates":[],"updated_by":[],"see_also":[],"doi":"10.17487\/RFC6910","errata_url":null}