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Chapter 1: Overview
What is Tenor CMS?
The Tenor Carrier MultiPath Switch (CMS) is a high-density VoIP (Voice over Internet Protocol) H.323
switch that digitizes voice and fax data and transmits it over the IP network. Tenor CMS is available in three
configurations: CMS (14 slot), CMS960 (8 slot), and CMS240 (2 slot); each is a slotted, scalable system that
intelligently switches calls over both the IP network and the PSTN in order to ensure high quality voice. Tenor
CMS functions as a gateway, gatekeeper, and a border element. The gateway converts circuit switched calls to
VoIP calls, the gatekeeper performs IP call routing functions, and the border element distributes the call rout-
ing directories throughout the network.
Each Tenor CMS is available with either AC or DC input power.
NOTE: Figure 1-1 illustrates Tenor units with AC power.
Figure 1-1 Tenor CMS VoIP Switch
The slotted system architecture boasts peripheral cards, which interface to various Wide Area Networks
(WANs). Tenor CMS connects to T1/E1 lines operating in either a trunk circuit or line circuit configuration.
The individual spans within the Tenor CMS may connect to either the PSTN or to T1/E1 termination equip-
ment on the user premises (i.e., PBX).
The high performance System Controller/CPU card provides up to four 10/100BaseT connections and one
RS-232 serial port connection; this card is an intelligent call routing engine which regulates system resources
and configuration while coordinating all voice traffic activity in the unit. The DS1, T1, and E1 cards provide
connections. The DS1 card also provides DSP processing (DSP is a signal processing resource; it performs
CMS (14 Slot)
CMS960 (8 Slot)
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