SIP Extensions for supporting Distributed Call State
draft-dcsgroup-mmusic-state-00

Document Type Expired Internet-Draft (individual)
Authors John Pickens  , K. Ramakrishnan  , Eric Miller  , Burcak Beser  , Bill Marshall  , Ed Miller  , Glenn Russell 
Last updated 1999-06-29
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at
https://www.ietf.org/archive/id/draft-dcsgroup-mmusic-state-00.txt

Abstract

This document describes extensions to the Session Initiation Protocol RFC(2543) for supporting telephony services using the Distributed Call Signaling architecture described in [2]. This document discusses extensions to the host parameter in the SIP URL for supporting the following: (a) a call signaling architecture where call state is distributed to the clients during call setup and stored there for the duration of the call, (b) support for local number portability and (c) relaxation of the strong coupling between the phone number and its gateway in the telephony subscriber URL as defined in RFC 2543. Additional headers in SIP messages for passing call state information between the clients and their proxies, and support for PSTN-based operator services are also discussed in this document. In addition, the need for the Also and Replaces headers previously discussed in [3]) are mentioned here.

Authors

John Pickens (jpickens@com21.com)
K. Ramakrishnan (kkrama@research.att.com)
Eric Miller (emiller@oclc.org)
Burcak Beser (burcak_beser@3com.com)
Bill Marshall (wtm@research.att.com)
Ed Miller (E.Miller@cablelabs.com)
Glenn Russell (G.Russell@cablelabs.com)

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)