General Functions
42
Making Calls
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 wish to
use this preferred connection and want to select a network opera-
tor yourself for each call (i.e. on a call-by-call basis), then before
making the call, select
LCRƒoff
from one of the MenuCards
described in the section entitled
MenuCard “Selection” in the Idle
State
.
This is only necessary if LCR has been configured for you in the
Forum 500 / Forum 5000. Consult your system administrator
about this.
Note:
Baby call and external call forwarding are not automatically
switched via preferred connections. In this case, if the network
operator you wish to use is not the default operator, you can key
in the appropriate operator’s code digits before entering the tele-
phone number.
Transmission of Call Numbers
With ISDN there are different features which allow or prevent the
transmission of (external) call numbers between subscribers.
“CLIP”
“CLIP” is an abbreviation for “Calling Line Identification Presenta-
tion”. The caller’s call number (if transmitted) is displayed by
means of the corresponding call key. If this number is also stored
in your telephone book, the caller’s name is displayed.
“CLIP no screening” Feature
Using “CLIP no screening” outgoing connections instead of send-
ing the real call number of the caller, send another call number.
Thus, instead of being shown your number, the subscriber you
have called is shown, for example, a service call number. The
feature “CLIP no screening” must be enabled by the network pro-
vider and activated in the system configuration by the system
administrator. When you receive an external call where the caller
indicates a different number than the one actually being transmit-
ted, your display will show a “?” next to the call number. If the
