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ISDN Software Reference for Linux and Windows
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USID
User Service Identifier
UUI
User-to-User Information. Proprietary messages sent to remote system
during call establishment.
Vari-A-Bill
Service bureaus can vary the billing rate of a 900 call at any
time during the call. Callers select services from a voice-automated
menu and each service can be individually priced.
voice channel
Designates a bi-directional transfer of data for a single call
between a voice device processing that call and the SCbus. Digitized
voice from the analog or T-1/E-1 interface device is transmitted over
the SCbus to the voice receive (listen) channel for processing by the
voice device. The voice device sends the response to the call over the
voice transmit channel to an SCbus time slot that transmits this response
to the analog or T-1/E-1 interface device.