AT&T MERLIN LEGEND Release 3.1 System Programming Manual page 854

Glossary
control unit
console
CONVERSANT
conversion
resource
COR
Coverage
CRC
CSU
cyclic redundancy
check
D
D4 framing format
Data-channel
data
communications
equipment
data hunt group
data module
Processor , power supply , modules, carrier s, and housing
of the system.
Refers to telephone and adjuncts (if any) at operator or
system programmer extension.
Entry-level voice response application that automatically
answers and routes calls and executes telephone
transactions.
See modem pool .
(class of restriction) Various types of restrictions that can
be assigned to remote access trunks or barrier codes.
These restrictions consist of Calling Restrictions, ARS
Facility Restriction Levels ( FRL s), Allowed Lists, Disallowed
Lists, and Automatic Callback queuing.
Set of system features that can determine how extensions'
calls are covered when the person at the extension is busy
or not available.
(cyclic redundancy check) An error-detection code used
on DS1 facilities with the extended superframe format
( ESF ).
(channel service unit) Equipment used on customer
premises to provide DS1 facility terminations and signaling
compatibility.
See CRC .
Framing format consisting of a sequence of individual
frames of 24 eight- bit slots and one signal bit (193 bits) in a
12-frame superframe. See also ESF .
See D-channel .
See DCE .
See DHG .
See ISDN 7500B Data Module .
GL–7
System Programming