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Before you begin

Audible signals

When you hear:

It means:

 

 

A rapid double-ring

You have an incoming intercom call.

pattern, repeating

 

 

 

A long single ring,

You have an incoming transferred call.

repeating

 

 

 

A short single ring,

The extension number you just

repeating

programmed has already been assigned.

 

Choose another number for this

 

extension.

 

 

A short single tone,

The extension you are calling is in

repeating

DND mode.

 

 

A long single tone,

The extension you are calling is busy.

repeating

 

 

 

A very long single

The extension you are calling is ringing or

tone, repeating

in DND mode.

 

 

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AT&T 974 user manual Audible signals, Choose another number for this, Extension, Tone, repeating DND mode