Avaya 6424D+M User Manual page 164

GL-2
GLOSSARY
black cable
BMT
building entrance facility
(BEF)
bulk power supply
bulk power unit
call coverage module
campus cable
carbon block
central office (CO)
circuit pack
combination protection
See distribution cable.
basic modular telephone
The cross-connect field (which may or may not be enclosed) where
cables from the central office (CO) terminate for cross-connection to
the network interface (NI).
A power supply capable of supplying power to multiple voice
terminal adjuncts.
The combination of a panel that plugs into 120 VAC and up to three
power supplies that are mounted on the panel to supply power to
voice terminal adjuncts.
A voice terminal adjunct with 20 line-appearance lamps. The module
is usually used by a secretary (or clerk) covering calls for a group.
The group's phones are bridged to the secretary's, and a line
appearance lamp lights on the module when a member of the group
receives a call.
See distribution cable.
A surge-limiting device that is placed in series with distribution
cabling or cabling from the central office (CO). The block arcs to
ground across an air gap when voltage surges through it in excess of
a predetermined level. Carbon blocks are used as primary electrical
protection.
A location housing telephone switching equipment that provides local
telephone service and access to toll facilities for long-distance
service.
A circuit board of one or more layers that is inserted into the carriers
of a switch cabinet and that controls a particular operation of the
switch.
The use of primary and secondary electrical protectors, usually in a
single device, to protect against two or more types of electrical
surges.