Table of Contents
Advertisement
Telephoning
Transmission of Call Numbers
With ISDN there are different features which allow or prevent the transmission of
(external) call numbers between subscribers.
"CLIP" feature
CLIP is an abbreviation for "Calling Line Identification Presentation". The caller's call
number (if transmitted) is displayed. If this number is also stored in the
OpenCom 100 / Aastra 800 telephone book, the caller's name is displayed.
"CLIP no screening" feature
Using "CLIP no screening" outgoing connections instead of sending 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 provider and acti-
vated 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
transmitted, your display will show a "?" next to the call number. If the indicated call
number is saved as a phone book entry, as usual, the name will be shown along with a
question mark.
Note
Display of the question mark "?" is the system default. The system administrator can
switch off this default setting in the web configurator with the Mark unchecked
phone number with ? option (Telephony: Settings menu).
"CNIP" feature
CNIP is an abbreviation for "Calling Name Identification Presentation". In addition to
the call number, the name configured by the caller is also transmitted and displayed
on the corresponding call key. This assumes that the network provider transmits this
information with the connection. If the caller's number is listed in the OpenCom 100 /
Aastra 800 telephone book, then this – local – entry is displayed in preference.
"CLIR" feature
CLIR is an abbreviation for "Calling Line Identification Restriction". Before dialling a
call number, you can decide from case to case if you wish to prevent your call number
from being displayed to the called subscriber. To do this, select Suppress number
(see also "Selection" Menu in the Idle State starting on page 37). If this feature is not
provided, your call number will always or never be displayed, depending on the
system setting. Consult your system administrator for more information.
33
Advertisement
Table of Contents
