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Glossary and Abbreviations
555-230-024GL-48 Issue 5 January 1998
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.
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