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IP Telephony: Packet-based Multimedia Communications Systems by Jean-Pierre Petit, David Gurle, Olivier Hersent

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Chapter 3. Media gateway to media controller protocols (MGCP)

Introduction

It is interesting to note that once the technical credibility of carrying real-time data such as voice over IP was acknowledged by the carriers and service providers, the involvement of well known telecommunications equipment manufacturers in the definition of IP telephony protocols changed dramatically.

In the early days of IP telephony, 1995–1997, the VoIP market was created by the pioneers using the drivers of cheap, long-distance and international communications and the excitement of new technology. This trend was supported by endpoint-oriented – mostly PC vendors such as Intel and Microsoft. It is not surprising that the first incompatibility issues between IP telephony ...

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