Avaya Communication Manager Administrator's Manual page 1785

BPN
Billed-party number
bps
See bits per second
bridge (bridging)
The appearance of a voice terminal's extension at one or more other voice terminals.
BRI
The ISDN Basic Rate Interface specification.
bridged appearance
A call appearance on a voice terminal that matches a call appearance on another voice terminal for the
duration of a call.
BTD
Busy Tone Disconnect
BTU
British Thermal Unit
buffer
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.
bus
A multiconductor electrical path used to transfer information over a common connection from any of
several sources to any of several destinations.
business communications terminal (BCT)
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.
BX.25
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.
bypass tie trunks
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.
byte
A sequence of (usually eight) bits processed together.
C
cabinet
Housing for racks, shelves, or carriers that hold electronic equipment.
cable
Physical connection between two pieces of equipment (for example, data terminal and modem) or
between a piece of equipment and a termination field.
Administrator's Guide for Avaya Communication Manager
November 2003
(bps).
Glossary and Abbreviations
1785
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