The most commonly used companding (that is, COMpressing exPANDING) algorithm in North America and Japan, which has lower idle channel noise compared to a-Law companding.

Uninterruptible Power Supply (UPS)

A power backup device that allows network components to continue functioning in the event of a power failure.


The Cisco flagship converged messaging solution, offering a single repository for voice, e-mail, and fax messages.

Unity PBX-IP Media Gateway (PIMG)

A device that allows a Cisco Unity messaging system to be used in a legacy PBX environment.

user agent (UA)

A SIP device that contains call-forwarding intelligence, such as a User Agent Client (that is, a SIP device that places calls) or a User Agent Server (that is, a SIP device that receives a call).

Voice over IP First-Step
Voice over IP First-Step
ISBN: 1587201569
EAN: 2147483647
Year: 2005
Pages: 138
Authors: Kevin Wallace

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