Advanced Phone Features123 The phone plays a warning tone (if enabled). The BLF key LED flashes red. The caller ID appears on the LCD screen (if enabled).In the following figure, the LCD screen shows an incoming call from 2500 on themonitored line.NoteWhen there is an active call on the IP phone, you can transfer the active call to themonitored phone number directly by pressing the BLF key. The phone handles the activecall differently depending on the transfer mode via DSS key. For more information onperforming call transfer, refer to Transfer in DSS Keys section on page 71.You can use the BLF List feature to monitor a list of users defined by your systemadministrator. For example, your system administrator enables BLF List, and creates aBLF List URI (e.g., BLFList@example.com) including a list of user1, user2 on the server.The BLF List keys on the IP phone can present the status of user1 and user2. The key LEDsilluminate either flashing or solid depending on the status of those users. For more BLFList key LED indicators, refer to LED Instructions on page 14.You can use the BLF List keys in the following ways: When the monitored user is idle, press the BLF list key to dial out the phone number. When there is already an active call on the IP phone, you can transfer the activecall to the monitored user by pressing the BLF List key. The phone handles theactive call differently depending on the transfer mode on DSS key. For moreinformation on the transfer mode on DSS key, refer to Transfer in DSS Keys sectionon page 71. When the monitored user receives an incoming call, press the BLF list key to pick upthe call directly. Before picking up an incoming call, ensure that the BLF List PickupCode has been configured in advance. If the code is not configured, the phone willplace a call to the monitored user instead of picking up the incoming call of theIf your phone is locked and the type of the phone lock is configured as Function Keys orAll Keys, you cannot use the DPickup, Send, NewCall and Cancel soft keys until unlocked.For more information, refer to Phone Lock on page 40.