A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Basic Level of Interoperability for SIP
Services Working Group of the IETF.
Title : Call Completion for Session Initiation Protocol (SIP)
Author(s) : Dale R. Worley
Martin Huelsemann
Roland Jesske
Denis Alexeitsev
Filename : draft-ietf-bliss-call-completion-15.txt
Pages : 35
Date : 2012-08-02
Abstract:
The call completion feature defined in this specification allows the
caller of a failed call to be notified when the callee becomes
available to receive a call.
For the realization of a basic solution without queuing, this
document references the usage of the dialog event package (RFC 4235)
that is described as 'automatic redial' in the SIP Service Examples
(RFC 5359).
For the realization of a more comprehensive solution with queuing ,
this document introduces an architecture for implementing these
features in the Session Initiation Protocol where "Call completion"
implementations associated with the caller's and callee's endpoints
cooperate to place the caller's request for call completion into a
queue at the callee's endpoint, and when a caller's request is ready
to be serviced, re-attempt of the original, failed call is made.
The architecture is designed to interoperate well with existing call-
completion solutions in other networks.
The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-bliss-call-completion
There's also a htmlized version available at:
http://tools.ietf.org/html/draft-ietf-bliss-call-completion-15
A diff from the previous version is available at:
http://www.ietf.org/rfcdiff?url2=draft-ietf-bliss-call-completion-15
Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/
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