A New Internet-Draft is available from the on-line Internet-Drafts directories.
Title : An Extension to the Session Initiation Protocol
(SIP) for Media Loopback
Author(s) : K. Hedayat, et al.
Filename : draft-hedayat-media-loopback-00.txt
Pages : 14
Date : 2004-10-1
The wide deployment of SIP-based VoIP services has introduced new
challenges in managing and maintaining voice quality, reliability,
and overall performance. In particular, media delivery is an area
that needs attention. One method of meeting these challenges is
monitoring the overall service by establishing calls where the
media is looped back by the answering entity to the calling entity.
This is typically referred to as "active monitoring" of services.
Such calls are especially popular in ensuring the quality of
transport to the edge of a given VoIP service. Today in SIP-based
networks, short of running ' ping' and ' traceroute' to the edge,
service providers are left without the necessary tools to actively
monitor, manage, and diagnose quality issues with their service.
The extension defined herein adds new SDP media attributes which
enables SIP User Agent Clients to initiate calls wherein the media
is looped back by the SIP User Agent Servers thereby enabling the
User Agent Client to proactively measure the media performance of
the network.
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