AT&T MERLIN LEGEND Release 3.1 System Planning Manual page 373

Glossary
system
renumbering
T
T1
TDM
telephone power
supply unit
tie trunk
timed flash
tip/ring
touch-tone receiver
T/R
trunk
trunk jack
trunk pool
TTR
U
uninterruptible
power supply
unit load
Procedure used to change the numbers assigned to
telephones, adjuncts, calling group s, paging groups, park
zones, remote access , and lines/trunks.
Type of digital transmission facility that in North America
transmits at the DS1 rate of 1.544 Mbps.
(time-division multiplex) Process where the transmission
channel is divided into time slots.
Equipment that provides power to an individual telephone.
Private trunk directly connecting two telephone switches.
See also automatic-start tie trunk , delay-dial-start tie trunk ,
immediate-start tie trunk , and wink-start tie trunk.
See switchhook flash .
Contacts and associated conductors of a single-line
telephone plug or jack.
See TTR .
See tip/ring .
A telecommunications path between the communications
system and the telephone company central office ( CO ) or
another switch. Often used synonymously with line .
See line/trunk jack .
See pool .
(touch-tone receiver) Device used to decode DTMF touch-
tones dialed from single-line telephones or Remote
Access telephones.
See UPS .
Measure of the power load drain of a module, telephone,
or adjunct .
GL–25
System Planning