HP 480-0005-00-15 manual How does CMS fit in the VoIP Network?

Appendix A: Getting Acquainted with Tenor CMS in the VoIP Network

How does CMS fit in the VoIP Network?

VoIP (Voice over Internet Protocol) is a technology which enables voice and fax communications to be passed through your existing data network using the TCP/IP protocol, bypassing the PSTN. The Tenor CMS switch contains a DSP (Digital Signal Processor), which takes the voice and fax data coming from a Line Circuit, compresses it, and converts it into packets that can be transported over the Ethernet LAN. The data can then be transported through an IP-based router to a WAN or remote location. As a result, your voice and fax traffic runs over your data network to bypass the PSTN and avoid long distance tolls associated with the public net- work.

The Tenor CMS uses H.323, a protocol standard for sending multimedia communications (e.g., data/voice/ video) simultaneously over packet-based networks, such as IP. H.323 controls standards such as call control and call routing. An H.323 network consists of a group of endpoints (i.e., gateways, terminals, etc.) in one cor- porate site, controlled by one Gatekeeper. The Tenor CMS acts as an endpoint (gateway), gatekeeper and/or border element. The gateway converts the circuit switched calls to VoIP calls and the gatekeeper performs IP call routing functions, such as admission control.

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