Lucent Technologies 555-670-111 User Manual

Issue 1

April 1999

About This Guide 

lxii

Terms and Conventions Used 

apply), or contact your Lucent Technologies representative if you need assistance 
when installing, programming, or using your system.

Outside the USA, if you need assistance when installing, programming, or using 
your system, contact your Lucent Technologies authorized representative.

0

The terms described here are used in preference to other, equally acceptable 
terms for describing communications systems.

0

Facility is a general term that designates a communications path between a 
telephone system and the telephone company central office. Technically, a 

trunk 

connects a switch to a switch—for example, the MERLIN LEGEND 
Communications System to the central office. Technically, a 

line is a loop-start 

facility or a communications path that does not connect switches—for example, 
an intercom line or a Centrex line. In actual usage, however, the terms 

line and 

trunk are often applied interchangeably. In this guide, we use line/trunk and lines/
trunks to refer to facilities in general. Specifically, we refer to digital facilities. We 
also use specific terms such as 

personal line, ground-start trunk, Direct Inward 

Dialing (DID) trunk, and so on. When you talk to personnel at your local telephone 
company central office, ask them which terms they use for the specific facilities 
they connect to your system. 

Some older terms have been replaced with newer terms, as follows:

trunk module

line/trunk module

trunk jack

line/trunk jack

station

extension

station jack

extension jack

analog data station

modem data workstation

digital data station

terminal adapter workstation

7500B data station

ISDN terminal adapter data 
workstation

analog voice and
analog data station

analog voice and
modem data workstation

digital voice and 
analog data station

MLX voice and 
modem data workstation

analog data-only station

modem data-only workstation