AT&T MERLIN LEGEND Communications System Release 2.0 Maintenance And Troubleshooting Manual page 205

Glossary
bus
A multiconductor electrical path used to transfer information over a common
connection from any of several sources to any of several destinations.
campus cable
Cable that runs between buildings connected to the same communications
system.
CCITT
Committee Consultant Internatioale Telephonique et Telegraphique
CCS
common-channel signaling
Centrex
A set of communications system features a user can subscribe to on
telephone lines from the local telephone company.
channel
A telecommunications transmission path for voice and/or data.
coaxial cable
A cable consisting of one conductor, usually a small copper tube or wire,
within and insulated from another conductor of large diameter, usually copper
tubing or copper braid.
codec (coder-decoder)
A 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.
control unit
The housing, carriers, power supply, processor, and modules of a
communications system.
DCE
data communications equipment
D channel
The 16-kbps or 64-kbps channel carrying signaling or data on BRI or 64-kbps
channel carrying signaling or data on Rate Interface (PRI).
Glossary
GL-3