Overview5Line key LED (configured as a BLF key)LED Status DescriptionSolid green The monitored user is idle.Fast flashing green (200ms) The monitored user receives an incoming call.Slow flashing green (500ms)The monitored user is dialing.The monitored user is talking.The monitored user’s conversation is placed onhold.Slow flashing green (1s) The call is parked against the monitored user’sphone number.Off The monitored user does not exist.Line key LED (used as a page switch key)LED Status DescriptionSolid red There is a parked call on the line key of thenon-current page.Solid green There is a call on the line key of the non-currentpage.Fast flashing green The line receives an incoming call on thenon-current page.Fast flashing red The monitored user receives an incoming call onthe non-current page.Off Line keys on every page are idle.NoteTwo ways to customize configurations of your SIP-T42G IP phone: The user interface on the IP phone. The user interface in a web browser on your PC.The hardware components keypad and LCD screen constitute the phone user interface,which allows the user to execute all call operation tasks and basic configurationchanges directly on the phone. In addition, you can use the web user interface toaccess all configuration settings. In many cases, it is possible to use either the phoneuser interface and/or the web user interface interchangeably. However, in some cases,it is only possible to use one or the other interface to operate the phone and changesettings.The above introduces the default LED status. The statuses of the power indicator LED andBLF key are configurable via web user interface. For more information, refer toYealink_SIP-T4X_IP_Phone_Family_Administrator_Guide.