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Data Interface Unit (DIU)
This optional unit provides connections for your standard multi-line digital telephone and
Industry Standard Telephone (IST) device such as a FAX machine or answering machine.
Departmental Station Operation
The operation of stations that are organized into departments.
Dial By Name
This feature allows users to employ any two-line display, LCD speakerphone and
its interactive buttons to search through an index of names, locate a desired
station name or system speed dial name, and automatically call the located item.
Digital Voice Announcing (DVA)
The DVA is a line-powered device that provides voice prompts for auto-attendant
and transfer, or you can use it to enhance the operation of DISA and Tracker.
Direct Inward System Access (DISA)
An enhancement option that allows outside callers to directly call a station or
access certain internal system features, including all line groups and ARS. To
prevent fraudulent access and unauthorized use, the caller must use an authoriza-
tion code and system access code to gain access to outside lines as well as many
of the advanced telephone features.
Direct Inward Station Dialing (DISD or DID)
This feature allows an outside party to call an intercom station directly without
an attendant’s assistance.
Direct Station Selection/Busy Lamp Field (DSS/BLF)
Programmable buttons which allow the user one button to place intercom calls to
other stations within your system; the button is sometimes referred to as a DSS
button. Busy lamp field or BLF is a term for a light that identifies current call
status of DSS station. See telephone layout drawings in Chapter 1 for location.
Do Not Disturb
A mode that disables incoming call ringing and intercom calling.
Dual Tone Multiple Frequency (DTMF)
The tones made by your telephone when you dial.
DXP, DXP Plus, FXS and FXT
Common Code Based Systems; DXP, DXP Plus, FXS and FXT Comdial
Communication Systems so named because the programmed function codes of
these systems are interchangeable.
Dynamic Line Button
System temporarily assigns a normally unassigned line to an idle line button for
certain call handling operations.
Large Screen Display Speakerphone Station User’s Guide 101
GCA70-349 Glossary