Dial tone

(System ready to accept digits.)

Special dial tone

(System ready to accept digits. The special dial tone indicates an active diversion, an active absence information or waiting messages.)

Ringing tone

(Ringing signal to called party)

Busy tone

(Called party is busy)

Number unobtainable tone

(Called number not accessible or vacant)

Call Waiting tone

Congestion tone

(Call cannot be executed due to congestion or called party blocked)

Verification tone

(Verification that ordered function is accessed)

Intrusion tone

(Sent to all parties during Intrusion)

Internal ringing signal

External ringing signal

Automatic Callback signal

Description

Tones & Signals

Tones are audible in the handset.

- repeated after 4 s

Ringing signals are emitted from the phone.

- repeated after 4 s

- repeated after 4 s

Note: The tones and ringing signals in this guide refer to the standard system but may vary between countries.

BusinessPhone – Ericsson Dialog 4422 IP Office

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Ericsson 4422 manual Tones & Signals