AASTRA 4223 Manuale Utente

Introduction to Your Extension

14

Tones, Voice Announcements, and Ring 
Tones

Over and above visual information displayed on your extension’s 

screen and LEDs, there are also various tones, voice announcements 

and ring tones that signal the status of your extension, or certain 

associated services.
The tones heard are applied under the following conditions and 

with the following timing and frequency:

Internal dial tone

•

Heard each time the handset is picked up from your 

extension (excluding all activated special services).

330 Hz

Continuous

External dial tone

•

Heard when a network prefix or an external call is dialled.

424 Hz

Continuous

Ringback tone

•

Heard when you call an extension that is free.

1,5 sec. On/3,5 sec. Off

Call on-hold or call 

camp-on tone

•

Heard when you call an extension that is busy and your call 

has been placed on automatic camp-on, or when your call is 

placed on-hold by a third party set.

424 Hz

2 consec. beeps, rep. every 5 sec.

Busy tone

•

Heard when you call an extension that is busy, but automatic 

camp-on is not possible for your call, or when a service 

request on your extension is refused.

424 Hz

0,5 sec. On/0,5 sec. Off

Call waiting presentation 

tone

•

Heard when you receive a new call, when your extension is 

already busy.

424 Hz

Only 1 ring signal, not repeated

Special dial tone

•

Heard each time your extension’s handset is picked up, when 

there is a call forwarded active for your extension, or when it 

is the recipient of a call forward for a third party set (apart 

from other special activated services).

424+330 Hz

0,75 sec. On/0,75 sec. Off

Re-routing on call forward

•

Heard when you call an extension that has a call forward that 

is active, when the call forward is executed.

424 Hz

0,05 sec. On/0,05 sec. Off

Intrusion or call offer tone

•

Heard when a third party – typically an attendant – intervenes 

during your current call.

424 Hz

2 consec. beeps, rep. every 1,4 sec.

Service Acceptance tone

•

Heard when a request for service is accepted on your 

extension.

Melody

Multi-toned melody – continuous.