A New Internet-Draft is available from the on-line Internet-Drafts directories.
Title : Architectural Considerations for Providing Carrier
Class Telephony Services Utilizing Session Initiation
Protocol SIP-based Distributed Call Control Mechanisms
Author(s) : W. Marshall, M. Osman, F. Andreasen, D. Evans
Filename : draft-dcsgroup-sipping-arch-01.txt
Pages : 21
Date : 2003-1-16
This document provides an overview of a SIP-based Distributed Call
Signaling (DCS) architecture to support carrier class packet-based
voice, video, and other real time multimedia services. Companion
documents address a specific set of SIP 2.0 protocol extensions and
usage rules that are necessary to implement the DCS architecture in
an interoperable fashion.
The DCS architecture takes advantage of endpoint intelligence in
supporting telephony services without sacrificing the network's
ability to provide value through mechanisms such as resource
management, lookup of directory information and translation
databases, routing services, security, and privacy enforcement. At
the same time, the architecture provides flexibility to allow
evolution in the services that may be provided by endpoints and the
network.
DCS also takes into account the need to manage access to network
resources and account for resource usage. The SIP usage rules
defined in the accompanying IDs specifically address the
coordination between Distributed Call Signaling and dynamic quality
of service control mechanisms for managing resources over the access
network. In addition, the DCS architecture defines the interaction
needed between network provided call controllers, known as a 'DCS-
proxy' for supporting these services.
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