User manual

Make a call – Basic Functions

Step by Step

Using the callback facility

If an internal station which you have called is busy or

there is no reply, you can place a request for callback.

This also applies to external calls via ISDN switching

centres. This saves you having to dial the number re-

peatedly. You are then called back

• as soon as the other party terminates his call

• as soon as the other party makes a further call

• as soon as the other party checks his mailbox and

responds to your callback request  page 20.

You can only place one request for callback at a time.

Storing a callback request

Precondition: The station which you have called is

busy or there is no reply.

Press the key. The lamp lights up.

qd or qm UK code or Standard code

Answering a callback request

The telephone rings.

n Lift the handset. Ringing tone can be heard.

If your telephone belongs to an ONS group (One

Number Service  page 46), please note the fol-

lowing features:

Callback On Busy is indicated only on the busy

telephone, not in the whole ONS group.

Callback On No Reply is entered in the mailbox

 page 20 for all internal system telephones in

an ONS group.

Callback

If you do not answer a callback request within

four rings, the request is cancelled.