Subject: [NEXTEL-1] Voice over IP Signaling: H.323 and Beyond

From: [email-masked]
Date: Sun, 20 Jul 2003 22:08:21 -0400

Voice over IP Signaling: H.323 and Beyond

ABSTRACT

Signaling has been one of the key areas of
Voice over IP (VoIP) technologies since inception.
H.323 was the key protocol that allowed
interoperability of VoIP products and moved the
industry away from the initial proprietary solutions.
Once the VoIP industry started maturing,
some limitations of H.323 came to light. In this
article we provide an overview of H.323, describe
its capabilities, and discuss how its limitations
are being addressed using the concept of gateway
decomposition. We also discuss how H.323
can coexist with other protocols such as MGCP,
H.248, and SIP which are attracting a lot of
interest in the VoIP industry today.

http://www.comsoc.org/livepubs/surveys/public/2000/dec/pdf/liu.pdf

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