AT&T MERLIN LEGEND Release 3.0 System Programming Manual page 788

Glossary
central office
Centrex
channel
channel service
unit
checksum
circuit-switched
data call
class of restriction
clock
synchronization
CMS
c o
coaxial cable
codec
common channel
signaling
communications
system
GL–6
System Programming
See CO.
Set of system features to which a user can subscribe on
telephone 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
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. .
(coder-decoder) Device used to convert analog signals
such as speech, music, or television to digital form for
transmission over a digital medium and back to the
original analog form.
See CCS.
Software-controlled processor complex that interprets
dialing pulses, tones, and or keyboard characters and
makes the proper interconnections both inside and
outside. Consists of a computer, software, a storage
device, and carriers with special hardware to perform the
actual connections. Provides voice and/or data
communications services, including access to public and
private networks, for telephones and other equipment.
Also referred to in this guide as "system," short for
MERLIN LEGEND Communications System.