Instruction manual

DEFINITY® Business Communications System and GuestWorks® Issue 6
Overview
555-231-208
Issue 1
April 2000
Glossary and Abbreviations
GL-5
baud
A unit of transmission rate equal to the number of signal events per second. See also bit rate
and
bits per second (bps)
.
BCC
See Bearer capability class (BCC)
.
BCMS
Basic Call Management System
Bearer capability class (BCC)
A code that identifies the type of a call (for example, voice and different types of data).
Determination of BCC is based on the caller’s characteristics for non-ISDN endpoints and on the
Bearer Capability and Low-Layer Compatibility Information Elements of an ISDN endpoint. Current
BCCs are 0 (voice-grade data and voice), 1 (56 kbps data transmission), 2
(synchronous/asynchronous data transmission up to 19.2 kbps) 3 (64 kbps circuit/packet data
transmission), 4 (64 kbps synchronous data), 5 (temporary signaling connection, and 6 (wideband
call, 128–1984 kbps synchronous data; not supported by this system).
bit (binary digit)
One unit of information in binary notation, having two possible values: 0 or 1.
bits per second (bps)
The number of binary units of information that are transmitted or received per second. See also
baud
and bit rate.
bit rate
The speed at which bits are transmitted, usually expressed in bits per second. Also called data rate.
See also baud and bits per second (bps).
BLF
Busy Lamp Field
BPN
Billed-party number
bps
See bits per second (bps)
.
bridge (bridging)
The appearance of a telephone’s extension at one or more other telephone.
BRI
The ISDN Basic Rate Interface specification.
bridged appearance
A call appearance on a telephone that matches a call appearance on another telephone for the
duration of a call.
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.