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           : SIP Service Examples
        Author(s)       : A. Johnston et al.
        Filename        : draft-ietf-sipping-service-examples-02.txt
        Pages           : 156
        Date            : 08-Jul-02
        
This informational document gives examples of SIP (Session Initiation 
Protocol) services.  This covers most features offered in so-called 
Centrex offerings from local exchange carriers and PBX (Private 
Branch Exchange) features.  Most of the services shown in this 
document are implemented in the SIP User Agents, although some 
require the assistance of a SIP Proxy.  Some require some extensions 
to SIP including the REFER method and Replaces header. These features 
are not intended to be an exhaustive set, but rather show 
implementations of common features likely to be implemented on SIP IP 
telephones in a business environment.

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