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Departmental station operation: The operation of stations that are
organized into departments.
Direct Inward Station Dialing (DISD): 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): Using one
button to place intercom calls; 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.
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.
Dynamic line button: System temporarily assigns a normally
unassigned line to an idle line button for certain call handling operations.
E
Exclusive hold: Only the telephone placing the call on hold can retrieve
it.
Executive override: Breaking into a conversation at a busy called
telephone. This intrusion is announced by several quick tone bursts over
the conversation.
H
Handsfree answer inhibit: A telephone can be set to block voice calls
sent to it over the speaker.
Hookflash: Action that occurs when the TAP button is pressed. Needed
for activating host system features.
Hookswitch: The switch on a telephone which, when depressed
manually or by the handset, disconnects a call.
K
Keypad: Buttons 0 through 9, ✳ and # used for dialing.
L
Last number redialing: Automatically dialing the last number dialed.
Glossary GCA70–245
G–2 LCD Speakerphone Reference Manual