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Glossary
CONVERSANT
conversion resource
COR
Coverage
CRC
CSU
cyclic redundancy
check
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 (FRLs), Allowed Lists,
Disallowed Lists, and pool dial out restrictions.
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.
D
D4 framing format
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.
Data-channel
See D-channel.
data
See DCE.
communications
equipment
data hunt group
See DHG.
Maintenance and Troubleshooting GL–9