SIP proxy-to-proxy extensions for supporting Distributed Call State

Document Type Expired Internet-Draft (individual)
Authors K. Ramakrishnan  , Eric Miller 
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This Internet-Draft is no longer active.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


In order to deploy a residential telephone service at very large scale across different domains, it is necessary for trusted elements owned by different service providers to exchange trusted information that conveys customer-specific information and expectations about the parties involved in the call. This document describes extensions to the Session Initiation Protocol (RFC2543) for supporting the exchange of customer information and billing information between trusted entities in the architecture described in <draft-dcsgroup- mmusic-arch-00.txt>.


K. Ramakrishnan (
Eric Miller (

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