AT&T MERLIN LEGEND Release 3.1 System Planning Manual page 354

Glossary
CCS
centralized
telephone
programming
central office
Centrex
channel
channel service
unit
checksum
circuit-switched
data call
class of restriction
clear data channel
clock
synchronization
CMS
CO
coaxial cable
GL–6
System Planning
(common-channel signaling) Signaling in which one
channel of a group of channels carries signaling
information for each of the remaining channels, permitting
each of the remaining channels to be used to nearly full
capacity. In the system's 100D module, channel 24 can be
designated as the signaling channel for channels 1–23.
Programming of features on individual telephones;
performed at a central location by the system manager .
See also system programming and extension
programming.
See CO .
Set of system features to which a user can subscribe on
telephone lines/trunks from the local telephone company.
Telecommunications transmission path for voice and/or
data.
See CSU .
Sum of ones in a sequence of ones and zeros used to
detect or correct errors in data transmission.
Data call made through an exclusively established and
maintained connection between data stations .
See COR .
Clear data channels (also called unrestricted data
channels) allow the transmission of occurrences of more
than seven contiguous zero bits. If a clear data channel is
requested and only restricted channels are available, the
call will be rejected. See also restricted data channel.
Operation of digital facilities from a common clock.
(Call Management System) DOS-based application that
simulates the actions of a system operator by answering
and distributing calls. Also produces reports for call
analysis.
(central office) Location of telephone switching equipment
that provides local telephone service and access to toll
facilities for long-distance calling.
Cable consisting of one conductor, usually a small copper
tube or wire within and insulated from another conductor
of larger diameter, usually copper tubing or copper braid.