GCA70–246

Glossary

Glossary

A

Automatic callback: System will ring a calling telephone when a busy called telephone becomes idle.

Automatic set relocation: The ability of the telephone system to relocate your extension number and restore all previous settings after a physical move has occurred.

B

Busy Lamp Field (BLF): Rows of lights on a telephone that shows which extensions on the system are busy and which ones are not.

C

Call forwarding: Designating another telephone to receive intercom calls normally directed to the user’s telephone.

Call park: Placing an active call at a particular telephone in system hold (park orbit) and retrieving it by any telephone.

Call waiting: A feature that allows a caller to signal a called party with a tone when the called party is busy on another call. This lets the called party know that another caller is waiting to speak to him or her.

D

Busy Lamp Field (BLF): Busy lamp field or BLF is a term for lights on the telephone that identifies current call status of other extensions.

Dual Tone Multiple Frequency (DTMF): The tones made by your telephone when you dial.

E

Exclusive hold: Only the telephone placing the call on hold can retrieve it.

Single Line Station User's Guide G–1

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Vertical Communications II, DSU manual Glossary