VAD reduces bandwidth consumption without degrading voice quality. Up to 64 ms of near-end delay can be canceled. The UVM continually senses and detects fax and modem carrier tones. With fax relay, connections do not need to be upgraded upon fax detection. Thus, low bandwidth trunks can carry fax traffic at approximately the same bit rate as compressed voice.
Fax demodulation provides highly efficient transport of fax traffic.
Fax relay and modem detection ensure compatibility with all voice-grade data connections. The UVM supports super-rate data connections. A super-rate connection is an aggregate of channels that functions as a single, logical connection. While the required bandwidth is traffic dependent, this feature provides greater than 75 percent savings over traditional transport mechanisms. In traditional applications, the D-Channel requires 64 Kbps of dedicated bandwidth.