call waiting

a telephone feature that notifies you of an

 

incoming call while on another call.

callback

feature that allows you to request the use of

 

a busy extension or line. The system will

 

signal your telephone when the telephone

 

or line is available.

conferencing

feature that allows you to have up to five

 

parties on a call.

confirmation

three short tones indicating that an

tone

action was accepted.

coverage

feature that allows individuals to have their

 

calls answered by someone else.

DDC

(Data Dial Code) extension number

 

assigned to a data terminal.

DGC

(Direct Group Calling) a group of

 

telephones where incoming calls are

 

distributed among the group members.

DSS

(Direct Station Selection) button containing

 

an extension number or an access code, and

 

programmed by the System Administrator.

 

(FLEX DSS are buttons that you can

 

program.)

DXS buttons

(Direct Extension Selector buttons) small

 

buttons on the selector console that are

 

used for sending a call to a specific

 

extension.

data call (from

feature that allows you to place a data

telephone)

call from your telephone, then transfer the

 

call to your data terminal.

dequeueing tone

three short tones indicating the Callback

 

feature can now be completed.

exclusion

feature that allows you to keep others from

 

listening in on a conversation.

extending calls

procedure followed by the attendant when

 

sending a call to the desired party.

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AT&T System 25 manual Ddc