Instruction manual

Glossary
trunk pool
See
pool and modem pool .
TTR
(touch-tone receiver) Device used to decode
DTMF touch-
tones dialed from
single-line telephones or Remote
Access
telephones.
U
uninterruptible
power supply
See
UPS .
UPS
(uninterruptible power supply) Device that connects to the
system to provide 117 VAC to the equipment when the
commercial power source fails.
V
VAC
(alternating-current voltage)
VDC
(direct-current voltage)
VMI
(voice messaging interface) An enhanced
tip/ring port.
videoconferencing
system
System application that allows face-to-face meetings, with
voice and video, to occur between individuals or groups.
This application requires high-speed data transmission
facilities. See also
desktop videoconferencing and group
videoconferencing.
voice mail
Application that allows users to send messages to other
extensions in the system, forward messages received with
comments, and reply to messages.
voice messaging
interface
See
VMI .
W
WATS
(Wide Area Telecommunications Service) Service that
allows calls to certain areas for a flat-rate charge based on
expected usage.
System Manager's Guide
GL–21