A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Session Initiation Proposal Investigation Working 
Group of the IETF.

        Title           : Guidelines for Usage of the Session Initiation 
                          Protocol (SIP) Caller Preferences Extension
        Author(s)       : J. Rosenberg, P. Kyzivat
        Filename        : draft-ietf-sipping-callerprefs-usecases-00.txt
        Pages           : 45
        Date            : 2003-7-2
        
This document contains guidelines for usage of the Caller Preferences
Extension to the Session Initiation Protocol (SIP). It motivates the
benefits of caller preferences with specific example applications,
provides use cases to show proper operation, provides guidance on the
applicability of the registered feature tags, and describes a
straightforward implementation of the matching algorithm.

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