Step by StepMaking calls – the basic functions42CallbackThis function enables you to call a user who does notanswer or whose line is busy. The Callback function en-ables you to contact him as soon as he hangs up or re-uses his telephone. Please note that a line is signaledas busy when it is being called by another user. You cancontinue to use your handset without restriction whena callback has been booked.Booking a callbackp The number is dialed. You hear the busy tone or theuser does not answer.[ Save the callback request.a Press the On-hook key to end the operation.You receive a Callback callYou receive a Callback call:• as soon as the selected user terminates his or hercall, or• the first time the user uses his or her handset, or• as soon as the other party checks his or her mailboxand responds to your callback request Æ Page 90.c or d Press the Talk or Speakerphone key briefly. The connec-tion is set up.CALLBACKNote:Callbacks are repeated until a connection is es-tablished or until the callback is deleted. A hand-set can initiate up to five callbacks and can bethe destination for up to five callback requests.If these conditions are met, any further call-backs are rejected.