AT&T MERLIN LEGEND Release 3.0 Installation Manual page 577

Glossary
campus cable
CAS
CAT
CCS
centralized
telephone
programming
central office
Centrex
channel
channel service unit
checksum
circuit-switched data Data call made through an exclusively established and
call
class of restriction
Cable that runs between buildings connected to the same
communications system.
(Call Accounting System) DOS- or UNIX System-based
application that monitors and manages
telecommunications costs.
(Call Accounting Terminal) Stand-alone unit with a built-in
microprocessor and data buffer that provides simple call
accounting at a low cost.
(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.
maintained connection between data stations.
See COR.
Maintenance and Troubleshooting GL-7