AT&T MERLIN LEGEND Release 3.0 Installation Manual page 601

Glossary
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
(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.
Maintenance and Troubleshooting GL–31