Filter
Top Products
DEFINITY Enterprise Communications Server Release 6
Installation and Test for Multi-Carrier Cabinets
555-230-112
Issue 5
May 1998
Glossary and Abbreviations
Page GL-49
trunk allocation
The manner in which trunks are selected to form wideband channels.
trunk-data module
A device that connects off-premises private-line trunk facilities and DEFINITY ECS. The trunk-data
module converts between the RS-232C and the DCP, and can connect to DDD modems as the
DCP member of a modem pool.
trunk group
Telecommunications channels assigned as a group for certain functions that can be used
interchangeably between two communications systems or COs.
TSC
Technical Service Center
TTI
Terminal translation initialization
TTR
Touch-tone receiver
TTT
Terminating trunk transmission
TTTN
See tandem tie-trunk network (TTTN)
.
TTY
Teletypewriter
U
UAP
Usage-allocation plan
UART
Universal asynchronous transmitter
UCD
Uniform call distribution
UCL
Unrestricted call list
UDP
See Uniform Dial Plan (UDP)
.
UL
Underwriter Laboratories
UM
User manager
Uniform Dial Plan (UDP)
A feature that allows a unique 4- or 5-digit number assignment for each terminal in a multiswitch
configuration such as a DCS or main-satellite-tributary system.