3com 3102 Manuel D’Utilisation

Your administrator can set up your NBX system to allow for Internal and 
External Caller ID or can configure the system so that you can block your 
identity (telephone number) from anyone you call.

By default, the NBX system shows the extension and name of any internal 
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 and if the caller has not blocked the information 
from being sent to the NBX system.

Availability and service charges for External Caller ID vary by location.

On NBX systems that include T1 lines that are configured as DS1, you can 
choose to prevent the NBX system from transmitting your Caller ID 
information to outside parties when you dial a call. Your administrator 
must enable this feature, called Calling Line Identity Restriction (CLIR), on 
the NBX system. If this feature is enabled system-wide, you can choose to 
restrict calls:

■

For all external (outbound) calls that you dial

■

For only the next single external (outbound) call that you dial

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 your NBX Telephone shows CLIR-ALL on.

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.