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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