Telephoning54Least Cost Routing (LCR)Whenever you make an external call, your system automatically uses LCR to set up aconnection 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 networkoperator yourself for each call (i.e. on a call-by-call basis), then before making the call,select the LCR off entry from the menu described in the section entitled MenuCard“Selection” in the Idle State.This is only necessary if LCR has been configured for you in the OpenCom 100 /Aastra 800. Consult your system administrator about this.NoteBaby call and external call forwarding are not automatically switched via preferredconnections. In this case, if the network operator you wish to use is not the defaultoperator, you can key in the appropriate operator’s code digits before entering thecall number.Transmission of Call NumbersWith 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 callnumber (if transmitted) is displayed by means of the corresponding call key. If thisnumber is also stored in your telephone book, the caller’s name is displayed.“CLIP no screening” FeatureUsing “CLIP no screening” outgoing connections instead of sending the real callnumber of the caller, send another call number. Thus, instead of being shown yournumber, 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 anexternal call where the caller indicates a different number than the one actually beingtransmitted, your display will show a “?” next to the call number. If the indicated callnumber is saved as a phone book entry, as usual, the name will be shown along with aquestion mark.
