Octel XC1000, Service Manual, Page: 813 / 889

GLOSSARY
Gloss-3 Edition One XC1000 Service
Automatic transfer
. A voice-processing feature that routes a caller to an attendant,
given certain conditions. For example, a caller has placed a call from a rotary-
dial telephone and cannot respond to prompts from the XC1000. The transfer
can be supervised or unsupervised.
AWG (American Wire Gauge). A measure of the thickness of wires. A low AWG
number represents a thicker wire than a high AWG number and can carry signals
farther.
B
Backplane. A fixed-wire network that connects logic cards to the system data and
control buses, provides interconnections among printed-circuit logic cards,
distributes power to all logic cards, and provides the interface between trunks
and TICs.
Backup. (1) A copy of a program or data in case the original is lost, damaged, or
otherwise inaccessible.*
Baud rate. (1) Term used for the speed of signal transmission, in bits per second. The
system manager terminal operates at 1200 or 9600 baud, and the printer
operates at 9600 baud. (2) Commonly used to mean bits per second, baud is
officially defined as the pulse width in a data-communication stream.
Binary. Numbering system with a radix of two. A binary code uses only two distinct
characters, usually the numerals 0 and 1. A binary digit is a character used to
represent one of the two digits in the binary numbering system.
Bit. The abbreviation for binary digit. A bit is the smallest unit of data handled by a
computer.
Bits per second. See bps.
Board. A flat, thin rectangular XC1000 component that includes connectors, test points,
switches, and LEDs. See also Card.
Boot. To start up and to load a computer. The set of instructions that reside on ROM
indicates to the processor to load software from some medium to RAM, which
enables the applications program to be used.
Boot table. Table on each system drive that contains drive-specific information. This
information is written to the boot table when the drive is formatted at Octel
Communications and cannot be altered. Offset 00 of the primary file-card status
reports any discrepancy found by the system file card while reading the install
and boot tables on each system drive. The system file card uses the data in
these tables to locate the drives during system startup.
bps (bits per second). The rate at which binary-encoded information is transmitted over
a communication channel. The voice processor’s system-manager terminal
operates at 1200 and 9600 bps.
Break key . A key used to cancel previous entries made from the keyboard. See also
Control–C keys.
Bulletin mailbox. A type 4 mailbox that receives messages and distributes them to a
specific group of subscribers.
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* WEBSTER’S Ninth New Collegiate Dictionary, 9th ed., Springfield, Merriam-Webster Inc., 1989.
A–B