82 CHAPTER 7: GETTING MORE FROM Y OUR T ELEPHONE SYSTEMExternal Caller ID provides the same information for external incomingcalls if your organization subscribes to the service from your localtelephone company and if the caller has not blocked the informationfrom being sent to the NBX system.Availability and service charges for External Caller ID vary by location.Calling Line IdentityRestriction (CLIR)On certain NBX systems, if your organization subscribes to Caller IDservice from your local telephone company, you can choose to preventthe NBX system from transmitting your Caller ID information to outsideparties when you dial a call. Your administrator must enable this feature,called Calling Line Identity Restriction (CLIR), on the NBX system. If thisfeature is enabled system-wide, you can choose to restrict calls:■ For all external (outbound) calls that you dialOR■ For only the next single external (outbound) call that you dialYour administrator can configure your system so that CLIR is alwaysactive, in which case you cannot change the CLIR settings on yourtelephone to override this option.CLIR for All External CallsTo enable CLIR-All for all calls from your telephone:1 Pick up the handset, and press Feature + 889. The display panel on your3Com 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 anyfuture calls until you disable this feature.To disable CLIR-All:1 Pick up the handset.2 Press Feature + 889 again. CLIR-ALL off appears briefly in the displaypanel and then disappears when you hang up the handset.To view your current CLIR-All setting, log in to NBX NetSet >User Information > Feature Settings.
