Telephoning General Functions
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Calling via the Handset
To switch open-listening on/off, press the hands-free/open-listening key
L. To
switch to hands-free mode, long press the hands-free/open-listening key and
replace the handset. Then release the hands-free/open-listening key.
Initiating a Hands-Free Call
Instead of lifting the handset, press the hands-free key/open-listening
L. End
the call by pressing the hands-free/open-listening key again.
2.2.10 Blocked/Unblocked Call Numbers
Your telephone can be blocked from dialling all or selected external numbers.
Emergency numbers can be entered in a special list, irrespective of your trunk line
access rights, and so always be dialled. Consult your system administrator for
details.
For the System Administrator:
Blocked and unblocked call numbers are managed in the Configurator, menu
PBX Configuration: Lists.
2.2.11 DTMF Postdial/VF Signalling
In the connection state your telephone is automatically set to VF (voice frequency)
signalling. You can use this, for example, to query an answering machine or a voice
mailbox.
2.2.12 Keypad Dialling
A number of European network operators need the keypad protocol to set fea-
tures. Depending on your system configuration your telephone could be set to
keypad dialling during the connection state. If this is not the case, you must switch
your telephone over to the keypad protocol ā before dialling ā and enter the code
digits specified by the network operator. These are transmitted directly to the
exchange and evaluated there. You usually get an announcement as an acknow-
ledgement. Consult your system administrator if you have questions concerning
this function.
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