Terms And Conventions Used - AT&T MERLIN LEGEND Release 3.1 Maintenance And Troubleshooting Manual

Terms and Conventions Used

Refer to the following documentation for additional information:
Equipment and Operations Reference provides detailed information
on system hardware, telephones, and other equipment.
Feature Reference provides details on the features of the
communications system.
System Programming gives procedural instructions for programming
system features.
Users' Guides and Operators' Guides give procedural instructions for
programming and using telephone features.
"Related Documents," later in this section, provides a complete list of system
documentation together with ordering information.
In the U.S.A. only, AT&T provides a toll-free customer Helpline (1 800 628-
2888) 24 hours a day. Call the Helpline, or your AT&T representative, if you
need assistance when installing, programming, or using your system.
Terms and Conventions Used
In this document, the terms in the following list 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 two 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 book, we use
line/trunk and lines/trunks to refer to facilities in general. Specifically, we refer
to digital facilities. We also use terms such as personal line, ground-start
trunk, DID trunk, and so on. When you talk to your local telephone company
central office, ask them what terms they use for the specific facilities they
connect to your system.
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