AT&T ISDN 7505, ISDN 7507, ISDN 7506 manual Tones and Their Meanings, Ringing Tones

Tones and Their Meanings

Ringing tones are produced by an incoming call. Handset tones are those which you hear through the handset (receiver).

Ringing Tones

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1 ring — A call from another extension.

2 rings — A call from outside or from the attendant.

3 rings — A priority call from another extension, or from an Automatic Callback call

you placed.

●ring-ping (half ring, not repeated) — A call redirected from your voice terminal to another because Send All Calls or Call Forwarding—Follow Me is active.

Handset Tones

●busy tone — A low-pitched tone repeated 60 times a minute; indicates the number dialed is in use.

●call waiting ringback tone — A ringback tone with a lower-pitched signal at the end; indicates that the extension called is busy, but the called party has been given a call waiting tone.