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GL-4 Glossary
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Basic Call
Transfer
A switchhook-flash method used on AUDIX Standalone and many switches to send
the AUDIX transfer command over analog voice ports.
Basic Rate
Interface (BRI)
International standard protocol for connecting a station terminal to an Integrated
Systems Digital Network (ISDN) switch. ISDN BRI supports two 64 Kbps
information bearer channels (B1 and B2), and one 16 Kbps call status and control (D)
channel (a 2B + D format). Also called Basic Rate Access.
Baud Rate Transmission signaling speed (see ‘‘bps’’).
Binary Digit
(Bit)
Two-number notation that uses the digits 0 and 1. Low-order bits are on the right (for
example, 0001=1, 0010=2, and so forth). Four bits make a nybble; eight bits make a
byte.
Blank Cartridge One or more spare removable cartridges required to back up system information.
Block Service Prevent use of a port, channel, or entire system through a fault or maintenance
procedure.
Body The part of AUDIX voice mail that contains the actual spoken message.
Boot (or
Reboot)
An activity that brings up (initialize) a system by loading programs from disk to
Feature Processor (FP) memory, activated by the Control Mode Menu (Function 5), a
power up, or the Maintenance Interface (MI) toggle switch. Control Mode Menu
(Function 6) does a partial reboot [the FP is restarted and the Data Base Processor
(DBP) initialized].
Boot Filesystem The filesystem selected during system initialization, either automatically or manually,
that the system tries to load its initial programs from. The filesystem name is
‘‘boot_f’’ for the active version and ‘‘boot_e’’ for the backup copy.
bps (bits per
second)
The number of binary units of information (1s or 0s) that can be transmitted per
second. Mbps refers to a million bits per second; Kbps refers to a thousand bits per
second.
Buffer Memory used to compensate for time differences in transmission by temporarily
storing data.
Bulletin Board See Information Service.
Bus The circuitry that links the various AUDIX subsystems together. The major AUDIX
buses are the Data Base Processor (DBP) or Versa-Module European (VME), S
(System), TD (Time Division), and M (Memory) bus.
Business
Communications
Terminal (BCT)
The currently recommended terminal for AUDIX maintenance or system
administration.
Busy-
Out/Release
To remove an AUDIX device from service (make it appear ‘‘busy’’ or in use), and
later restore it to service (release it). The AUDIX data link, voice ports, or Voice
Buffer (VB)/Time Division Bus Interface (TDBI) channels may be busied out if faulty
or while maintenance tests are run.
Byte A binary element string operated on as a unit and equal to eight bits.