special ringback tone

speed dialing

start

one long tone followed by one short, dull tone indicating that the person you dialed is busy on a call and has Call Waiting.

feature that allows you to place a call or enter an account code by pressing the “#” and a 2- or 3-digit code.

feature that initiates the sending of a call to a desired telephone.

switchhook

button depressed by the handset when the

 

telephone is not in use.

system

person responsible for assigning features

administrator

and overseeing System 25 operation.

test

feature that allows you to test the lights and

 

ringer on your SLAC and the lights on your

 

Selector Console.

transfer

trunk

feature that allows you to connect the person you are talking with to another person, and then drop out of the conversation.

a telecommunications line between two switching systems. (See also outside line. )

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AT&T System 25 manual Switchhook