User guide

Basic Functions
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DTMF Postdial / VF Signalling
When in the connection state, your telephone is automatically switched to VF sig-
nalling. Use VF signalling, e.g. to query a voice message or voicebox.
Charge Display (Charges)
If your network operator transmits charge information – even for external calls you
dial yourself – you will see the charge amount for the call during and after the call.
Transmission of Call Numbers
There are various ISDN services which either allow or prevent transmission of call
numbers between subscribers.
“CLIP” feature
CLIP is an abbreviation which stands for “Calling Line Identification Presentation”.
The call number of the caller is displayed (if transmitted). If the call number has
also been entered into the directory of the OpenCom 1000, the name is displayed.
“CNIP” feature
CNIP is an abbreviation which stands for “Calling Name Identification Presen-
tation”. In addition to the call number of a caller, the name provided by the caller is
transmitted and displayed. This requires that the network operator transmits this
information with the connection.
“CLIR” feature
CLIR is an abbreviation which stands for “Calling Line Identification Restriction”.
Before dialling a call number, you can determine from case to case whether the
transmission of your call number is to be suppressed to the person you are calling.
Select the “suppress tel no.” function to do so (see Menu when Idle starting on
page 39). If the feature is not available, depending on the system configuration,
your call number will either be always transmitted, or never transmitted. For more
information, consult your system administrator.