Terms And Conventions Used - AT&T MERLIN LEGEND Release 3.0 System Programming And Maintenance Manual

Terms and Conventions Used

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. {n 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.
Some older terms have been replaced with newer terms, The following list
shows the old term on the left and the new term on the right.
trunk module
trunk jack
station
station jack
analog data station
digital data station
analog voice and analog data station
digital voice and analog data station
analog data only station
digital data only station
digital voice and digital data station
xiv System Programming and Maintenance (SPM)
line/trunk module
line/trunk jack
extension
extension jack
modem data station
7500B data station
analog voice and modem data
MLX voice and modem data
modem data only station
7500B data only station
MLX voice and 75006 data station
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