AT&T 585-300-903 Data Terminal, Data Set, Dedicated Line, Default, Message Demand Testing, Device

Glossary GL-7

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Data Terminal	Standard type of data interface normally used for the endpoints in a connection.
Equipment	Normally AUDIX, most terminals, and the switch DCIU or SCI are DTE devices.
(DTE)
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	Voice mail that has been successfully transmitted to a recipient’s incoming mailbox.
Message
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-	The act of interrupting or preceding AUDIX system announcements by typing
Ahead/Dial-	(buffering) touch-tone commands in the order the system would normally prompt for
Through	them.
Digital	Discrete data or signals such as 0 and 1.
Digital	A 64 Kbps digital data transmission code with a 160 Kbps bipolar bit stream divided
Communications	into two information (I) channels and one signaling (S) channel.
Protocol (DCP)
Digital	The ISDN Basic Rate Access (BRI) DSL is the 2B+D format used for the T 4-wire
Subscriber Line	(2-pair) interface which connects CPE to ISDN.
(DSL)
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	An AUDIX-L circuit pack (UN161B) that controls up to four disk drives; the DIM
Module (DIM)	and IPC comprise a disk controller. On AUDIX, the disk controller is the SADI.
Display	A data terminal with a screen and keyboard used for displaying AUDIX forms and
Terminal	performing maintenance or administration activities.