Avaya 7505 ユーザーズマニュアル

Tones and Their Meanings

are produced by an incoming call.  Handset tones  are those which you

hear through the handset (receiver).

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— A call from another extension.

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— A call from outside or from the attendant.

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

you placed.

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— A call redirected from your voice terminal to

another because Send All Calls or Call Forwarding—Follow Me is active.

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— A low-pitched tone repeated 60 times a minute; indicates the number

dialed is in use.

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— 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.