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Glossary
Issue 2.0 December 1995 GL-27
U
UCD
See
uniform call distribution
.
Undelete
An Intuity AUDIX feature that allows subscribers to restore the last message deleted. The
subscriber presses * U to restore a deleted message.
undelivered message
A message that has not yet been sent to an Intuity AUDIX subscriber's incoming mailbox. The
message resides in the sender's outgoing message and may be modified or redirected by the
sender.
Unequipped
See
equipped/unequipped
.
unfinished message
A message that was recorded but not approved or addressed, usually the result of an interrupted
Intuity AUDIX session. Also called
working message
.
uniform call distribution (UCD)
The type of call-distribution group (or hunt group) of analog port cards on some switches that
connects subscribers and users to the Intuity AUDIX system. System 75, Generic 1, Generic 3,
and some central office switches use UCD groups. See also
call-distribution group
.
uninterruptable power supply
An auxiliary power unit for a telephone system that provides continuous power in cases where
commercial power is lost.
UNIX operating system
A multi-user, multi-tasking computer operating system.
upgrade
An installation that moves an AT&T Intuity system to a newer release.
untouched message
An Intuity AUDIX feature that allows a subscriber to keep a message in its current category by
using the **H (Hold) command. If the message is in the new category, message-waiting
indication remains active (for example, the message-waiting lamp will remain lit).
UPS
See
uninterruptable power supply
.
U. S. 123
An alternate announcement set in U. S. English whose prompts use numbers, not letters, to
identify phone keypad presses. For example, a prompt might say, “press star three,” instead of,
“press star D.”
user population
A combination of light, medium, and heavy users on which AT&T Intuity configuration guidelines
are based.