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VoIP Performance Management and Optimization by Habib Madani, Adeel Ahmed - CCIE No. 4574, Talal Siddiqui - CCIE No. 4280

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Chapter 1. Voice over IP (VoIP) and Network Management

The Internet Protocol (IP) network was primarily designed for carrying best-effort (no assurance for delivery without any impairment) data traffic. Traditionally, voice communication was primarily carried over the public switched telephone network (PSTN), which is a global network. Because of the success of IP in becoming a worldwide standard and the ubiquity of IP networks, interconnectivity of IP networks provides global connectivity to its users. The global nature of IP networks provides alternative solutions to carrying media, including voice, as long as it can be carried as a payload in an IP packet.

The change from circuit-switched technology to packet-switched technology leverages ...

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