Telephoning
General Information
32
3.1.9 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 voi-
cebox. Consult your system administrator if you have questions concerning this
function.
3.1.10 Call-charge Display
If your network operator transmits call charge information, and if you have dialled
an external number yourself, you will see the amount of the charge for this call
during the call or after you hang up.
3.1.11 Redialling
The last telephone numbers you dialled are stored in the redial list (with the most
recent entry at the top). If a telephone number is also stored in the OpenCom 100
telephone book, you will see the name.
3.1.12 Telephone Lock
You can switch the telephone lock on or off using the
Protection
-
Tele phone
lock
menu after entering your PIN. Switching on the telephone lock changes
dialling rights. You may no longer be able to make external calls or only make
them to a limited extent.
3.1.13 Blocked/Unblocked Call Numbers
Your telephone can be blocked from dialling all or selected external call numbers.
Emergency numbers (e. g. in Germany 110/112) can be entered in a special list,
irrespective of your trunk line access rights, and thus always be dialled. Consult
your system administrator for details.
3.1.14 Keypad Dialling
A number of European network operators need the keypad protocol in order to set
features. 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 – before dialling – and enter the code
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