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bridge (bridging)
BRI
bridged appearance
BTU
buffer
bus
business
communications
terminal (BCT)
BX.25
bypass tie trunks
byte
CACR
cabinet
cable
cable connector
CAG
The appearance of a voice terminal's extension at one or more other voice terminals.
The ISDN Basic Rate Interface specification.
A call appearance on a voice terminal that matches a call appearance on another
voice terminal for the duration of a call.
British Thermal Unit
1. In hardware, a circuit or component that isolates one electrical circuit from
another. Typically, a buffer holds data from one circuit or process until another circuit
or process is ready to accept the data.
2. In software, an area of memory that is used for temporary storage.
A multiconductor electrical path used to transfer information over a common
connection from any of several sources to any of several destinations.
A digital data terminal used for business applications. A BCT can function via a data
module as a special-purpose terminal for services provided by a processor or as a
terminal for data entry and retrieval.
A version of the CCITT X.25 protocol for data communications. BX.25 adds a fourth
level to the standard X.25 interface. This uppermost level combines levels 4, 5, and
6 of the ISO reference model.
A 1-way, outgoing tie trunk from a tandem switch to a main switch in an ETN. Bypass
tie trunks, provided in limited quantities, are used as a last-choice route when all
trunks to another tandem switch are busy. Bypass tie trunks are used only if all
applicable intertandem trunks are busy.
A sequence of (usually eight) bits processed together.
Cancellation of Authorization Code Request
Housing for racks, shelves, or carriers that hold electronic equipment.
Physical connection between two pieces of equipment (for example, data terminal
and modem) or between a piece of equipment and a termination field.
A jack (female) or plug (male) on the end of a cable. A cable connector connects
wires on a cable to specific leads on telephone or data equipment.
Coverage answer group
Issue 1.0 May 2003
CAG
393
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