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) : D. Worley, et al.
Filename : draft-ietf-bliss-call-completion-04.txt
Pages : 28
Date : 2009-07-13
The call completion features allow the calling user of a failed call
to be notified when the called user becomes available to receive a
call.
For the realization of a basic solution without queueing call-
completion requests this document references the usage of the the
dialog event package [RFC4235] as described as 'automatic redial' in
[RFC5359].
For the realization of a more comprehensive solution with queueing
call-completion requests this document introduces an architecture for
implementing these features in the Session Initiation Protocol: "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 the original, failed call.
The deployment of a certain SIP call-completion solution is also
dependent on the needed level of interoperability with existing call-
completion solutions in other networks.
A URL for this Internet-Draft is:
http://www.ietf.org/internet-drafts/draft-ietf-bliss-call-completion-04.txt
Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/
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Internet-Draft.
- <ftp://ftp.ietf.org/internet-drafts/draft-ietf-bliss-call-completion-04.txt>
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