September 2002
Intermediate to advanced
224 pages
4h 59m
English
Content preview from Voice-Enabling the Data Network: H.323, MGCP, SIP, QoS, SLAs, and SecurityBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Chapter 2. VoIP Network Architectures: H.323, SIP, and MGCP
Historically, VoIP networks have been H.323-based but emerging VoIP technologies, such as Session Initiation Protocol (SIP) and Media Gateway Control Protocol (MGCP), are now providing new IP-based voice services and applications. These new technologies possess numerous business benefits.
H.323-based wholesale VoIP networks have been the dominant VoIP architecture implemented by service providers for the past few years. H.323 VoIP networks have also been the dominant architecture for prepaid services. Prepaid calling card networks process user authentication on the gateway and then carry the voice across the IP network. The purpose of a wholesale VoIP network is to collect traffic from ...
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