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Telephoning
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 always be dialled. Consult your
system administrator for details.
Keypad Dialling
A number of European network operators need the keypad protocol in order to set features. In that
case, you must switch your telephone over to the keypad protocol – before dialling – and enter the
code digits specified by the network operator. These are transmitted directly to the exchange and eval-
uated there. You usually get an announcement as an acknowledgement.
This switches your telephone over to the keypad protocol. You can now enter the code digits for the
appropriate keypad.
!
The setting is deleted again when the connection is terminated!
Least Cost Routing (LCR)
Whenever you make an external call, your system automatically uses LCR to set up a connection to a
network operator that has been selected by the system administrator. If you do not want to use this pre-
ferred connection, then before your call, select
following section. Ask your System Administrator if LCR has been set up for you.
Baby call and external call forwarding are not automatically routed via preferred con-
!
nections. In this case, if the network operator you wish to use is not the default opera-
tor, you must prefix the desired telephone number with the operator's code.
Transmission of Call Numbers
In ISDN there are various services enabling and disabling the transmission of telephone numbers
between subscribers.
"CLIP" feature
CLIP is an abbreviation for "Calling Line Identification Presentation". The caller's telephone number (if
transmitted) is displayed. If this number is also stored in the system's telephone book, the caller's
name is displayed.
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LCR off
from the menu, as described in the
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