Configuring Advanced Features5435. (Optional.) Enter the string that will appear on the LCD screen in the Label field.6. Enter the phone number or extension you want to monitor in the Value field.7. (Optional.) Enter the directed call pickup code in the Extension field.8. Press the Save soft key to accept the change.BLF ListBusy Lamp Field (BLF) List allows a list of specific extensions to be monitored for status changes.It enables the monitoring phone to subscribe to a list of users, and receive notifications of thestatus of monitored users. Different indicators on the monitoring phone show the status ofmonitored users. The monitoring user can also be notified about calls being parked/no longerparked against any monitored user. IP phones support BLF list using a SUBSCRIBE/NOTIFYmechanism as specified in RFC 3265. This feature depends on support from a SIP server.NoteProcedureBLF List can be configured using the configuration files or locally.Configuration File.cfgConfigure BLF List.Parameters:account.X.blf.blf_list_uriaccount.X.blf_list_codeaccount.X.blf_list_barge_in_codeaccount.X.blf_list_retrieve_call_parked_code.cfgSpecify whether to automatically configurethe BLF list keys.Parameter:phone_setting.auto_blf_list_enableConfigure the order of BLF list keysassigned automatically.Parameter:phone_setting.blf_list_sequence_typeAssign a BLF List key.Parameters:linekey.X.type/expansion_module.X.key.Y.typelinekey.X.line/expansion_module.X.key.Y.lineIt is not applicable to SIP-T19(P) E2 and CP860 IP phones.