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Telecommunications Networks

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DEFINITION: Call control is a process that is used in telecommunications networks to monitor and maintain connections once they have been established. In voice over Internet Protocol (VoIP) systems, call control is used to control connections between H.323 endpoints, or between an endpoint and a gatekeeper. H.323 is an International Telecommunication Union (ITU) standard for digital communication between terminals,  … 
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Telecommunications NetworksWhite Papers (View All Report Types)
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A Buyer's Guide to IP PBX Options
sponsored by Alcatel-Lucent
WHITE PAPER: This white paper discusses the three alternative approaches to choosing the right IP-based telephony system and the key considerations you should consider to fulfill your critical business requirements.
Posted: 10 Sep 2007 | Published: 01 Feb 2007

Alcatel-Lucent
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TELECOMMUNICATIONS NETWORKS DEFINITION (continued): …  network equipment and services. In a VoIP network, call control is one of three major categories of communications traffic, the other two being call signaling and media communications. Call control uses Q.931, a connection protocol for digital networks, especially VoIP systems. Messages are transmitted as octets as specified in ITU H.245, which resolves the type of call media to be used (for example, conventional call, videoconferencing, or VoIP), and then manages the connection after it has been established. Call control functions include, but are not limited to, the determination of master/slave … 
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