Lucent Technologies Definity Enterprise Communication Server 8.2 User Manual

Issue 1

April 2000

Glossary and abbreviations 

1658

 

A person responsible for specifying and administering features and services for a system.

A process that allows stored data to be written from a tape into the system memory (normally after a power 
outage).

A digital transmission standard that in North America carries traffic at the DS1 rate of 1.544 Mbps. A T1 
facility is divided into 24 channels (DS0s) of 64 kbps. These 24 channels, with an overall digital rate of 1.536 
Mbps, and an 8-kbps framing and synchronization channel make up the 1.544-Mbps transmission. When a 
D-channel is present, it occupies channel 24. T1 facilities are also used in Japan and some Middle-Eastern 
countries.

Trunk Answer from Any Station

Telemetry asynchronous block serial

Trunk-access code

A switch within an electronic tandem network (ETN) that provides the logic to determine the best route for a 
network call, possibly modifies the digits outpulsed, and allows or denies certain calls to certain users.

The switched connection of an incoming trunk to an outgoing trunk without human intervention.

A private network that interconnects several customer switching systems.

Technical consultant

Traveling class mark

See 

time-division multiplexing (TDM)

.

Time-of-day routing

Terminating extension group

A device that sends and receives data within a system. See also 

administration terminal

.

A telecommunications channel that directly connects two private switching systems.