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ISDN-Telephones
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Making and Answering Calls

Special default ring signaling is set for your telephone: 

 
When you receive an internal call, your telephone rings once every four seconds (single-tone sequence).
When you receive an external call, your telephone rings twice in rapid succession every four seconds (dual-tone sequence).
When you receive a call from the entrance telephone, your telephone rings three times in rapid succession every four seconds (triple-tone sequence).
If a call is waiting, you hear a short tone (beep) every six seconds.

Answering a Call


Step by Step
 

The telephone rings. 


Lift the handset. 

Ending the call:


Replace the handset. 



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