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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-48
TDM
See time-division multiplexing (TDM)
.
TDR
Time-of-day routing
TEG
Terminating extension group
terminal
A device that sends and receives data within a system. See also administration terminal
.
tie trunk
A telecommunications channel that directly connects two private switching systems.
time-division multiplex (TDM) bus
A bus that is time-shared regularly by preallocating short time slots to each transmitter. In a PBX,
all port circuits are connected to the TDM bus, permitting any port to send a signal to any other
port.
time-division multiplexing (TDM)
Multiplexing that divides a transmission channel into successive time slots. See also multiplexing
.
time interval
The period of time, either one hour or one-half hour, that BCMS measurements are collected for a
reports.
time slice
See time interval
.
time slot
64 kbps of digital information structured as eight bits every 125 microseconds. In the switch, a
time slot refers to either a DS0 on a T1 or E1 facility or a 64-kbps unit on the TDM bus or fiber
connection between port networks.
time slot sequence integrity
The situation whereby the N octets of a wideband call that are transmitted in one T1 or E1 frame
arrive at the output in the same order that they were introduced.
to control
An application can invoke
Third Party Call Control
capabilities using either an adjunct-control or
domain-control association.
to monitor
An application can receive
event reports
on an active-notification, adjunct-control, or
domain-control association.
TOD
Time of day
tone ringer
A device with a speaker, used in electronic voice terminals to alert the user.
TOP
Task-oriented protocol
trunk
A dedicated telecommunications channel between two communications systems or COs.