MERLIN LEGENDCommunications System Release 6.1

 

Issue 1

System Planning 555-661-112

 

August 1998

About This Book

 

 

Terms and Conventions Used

 

Page xxxix

 

 

 

 

 

Terms and Conventions Used

0

 

 

 

 

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

Lines, Trunks, and Facilities

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.

However, in actual usage, the terms line and trunk are often applied interchangeably. In this guide, we use lines/trunks and line/trunk to refer to facilities in general. Specifically, we refer to digital facilities. We also use specific terms such as personal line, ground-start trunk, DID trunk, and so on. When you talk to personnel at your local telephone company central office, ask about the terms they use for the specific facilities they connect to your system.

Some older terms have been replaced with newer terms. The following list shows the old term and the new term.

Old

New

trunk module

line/trunk module

trunk jack

line/trunk jack

station

extension

station jack

extension jack

analog data station

modem data workstation

7500B data station

ISDN terminal adapter data workstation

analog voice and 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

7500B data-only station

ISDN terminal adapter data-only

 

workstation

MLX voice and 7500B data station

MLX voice and ISDN terminal adapter

 

data workstation

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Lucent Technologies 6.1 manual Terms and Conventions Used, Lines, Trunks, and Facilities, Old New