3Com 2102PE Phone Guide - Page 65
Caller ID, Internal and External Caller ID, Calling Line Identity Restriction (CLIR)
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Caller ID 65 Caller ID Your administrator can set up your NBX system to allow for Internal and External Caller ID and can configure the system so that you can block your identity (telephone number) from the person whom you are calling. Internal and External By default, the NBX system shows the extension and name of an internal Caller ID caller on the display panel of your NBX telephone. External Caller ID provides the same information for external incoming calls if your organization subscribes to the service from your local telephone company. Exception: The information does not appear if the caller has blocked the information from being sent to the NBX system. Availability and service charges for External Caller ID vary by location. Calling Line Identity Restriction (CLIR) (NBX 100 and SuperStack 3 NBX) On NBX systems that are configured using T1 lines configured as D1, you may need to or choose to prevent the NBX system from transmitting your Caller ID information to outside parties when you dial a call. This feature is called Calling Line Identity Restriction, or CLIR. You can restrict calls: ■ For all external (outbound) calls that you dial, or ■ For only the next external (outbound) call that you dial. Your administrator can configure your system so that CLIR is always active, in which case you cannot change the CLIR settings on your telephone to override this option. CLIR for All External Calls To enable CLIR-All for all calls from your telephone: 1 Pick up the handset, and press the Feature button and 889. The display panel on an NBX Telephone shows CLIR-ALL OFF. 2 Dial the number that you want to call. The NBX system does not send caller ID information on this call or any future calls until you disable this feature.