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Glossary GL-7
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Data Terminal
Equipment
(DTE)
Standard type of data interface normally used for the endpoints in a connection.
Normally AUDIX, most terminals, and the switch DCIU or SCI are DTE devices.
Data Set AT&T term for modem; a data set usually includes the telephone. See also modem.
DBP Bus The main bus in the DBP subsystem that interconnects the DBP-CPU, RAM, disk
controller, and VSFI. The BC circuit pack is the primary bus controller.
Dedicated Line A communications path that does not go through a switch. A dedicated (hard-wired)
path may be formed with directly connected cables. LADS, ADUs, or other devices
may also be used to extend the distance that signals can travel directly through the
building wiring.
Default A value that is automatically supplied if no other value is specified.
Defect Map See Alternate Tracking.
Delivered
Message
Voice mail that has been successfully transmitted to a recipient’s incoming mailbox.
Demand Testing Testing performed on request (usually by service personnel using a form).
Device A replaceable piece of hardware shown on the alarm and error log forms (part of a
unit).
Dial-
Ahead/Dial-
Through
The act of interrupting or preceding AUDIX system announcements by typing
(buffering) touch-tone commands in the order the system would normally prompt for
them.
Digital Discrete data or signals such as 0 and 1.
Digital
Communications
Protocol (DCP)
A 64 Kbps digital data transmission code with a 160 Kbps bipolar bit stream divided
into two information (I) channels and one signaling (S) channel.
Digital
Subscriber Line
(DSL)
The ISDN Basic Rate Access (BRI) DSL is the 2B+D format used for the T 4-wire
(2-pair) interface which connects CPE to ISDN.
Directory An AUDIX feature allowing you to hear a subscriber’s name and extension after
typing *D at the activity menu. Also, a group of related files accessed by a common
name in software, such as the mount point on disk where filesystems are located (for
example, /ss, /sd, /vd).
Disk Controller The IPC/DIM or SADI circuit pack(s) that control up to four disk drives. AUDIX-L
has two disk controllers (0 and 1). The AUDIX one- and two-cabinet configurations
have one (controller 0).
Disk Device The drive number associated with a disk controller that indicates its physical position.
Device numbers on AUDIX may be 0 to 2; the controller is always 0 (so disk02 is
written 0/2).
Disk Interface
Module (DIM)
An AUDIX-L circuit pack (UN161B) that controls up to four disk drives; the DIM
and IPC comprise a disk controller. On AUDIX, the disk controller is the SADI.
Display
Terminal
A data terminal with a screen and keyboard used for displaying AUDIX forms and
performing maintenance or administration activities.