This function enables you to call a user who does not answer or whose line is busy. The Callback function enables you to contact him as soon as he hangs up or re-uses his telephone. Please note that a line is signalled as busy when it is being called by another user. You can continue to use your handset without restriction when a callback has been booked.  

You can also send a callback request as a message (). This function can also be called by entering the code (). 

Booking a callback

The number is dialled. You hear the busy tone or the user does not answer. 

Save the callback request. 

Press the On-hook key to end the process. 

You receive a Callback call

You will receive the callback, as soon as the user you want has hung up or the first time he uses his telephone. The following appears on your handset display "Callback:...". 

Press the Talk key.
The connection is set up. 

Note:  Callbacks are repeated until a connection is established or until the callback is deleted. A handset can initiate up to five callbacks and can be the destination for up to five callback requests. If these conditions are met, any further callbacks are rejected.

Deleting a callback request

Press the Talk key. 

Call the system menu. 

Select and confirm the menu item. 

Select and confirm the menu item. 

Select and confirm the menu item.
 

Call the additional menu. 

Select and confirm the menu item. 

Press the On-hook key to end the process.