Siemens HiPath 4000 - Manual (Page 13)

Make a call – Basic Functions
13
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.
or 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.