Monitor Extension Status by BLF Key

This topic describes how to configure a BLF key on your IP phone via Auto Provisioning to monitor extension call status and DND (Do Not Disturb) presence.


The phone is connected to Yeastar P-Series Cloud Edition via Auto Provisioning, and has been assigned with an extension.

For more information, see Auto Provision IP Phones.


Step1. Set up a function key for extension monitoring

  1. Log in to PBX web portal, go to Extension and Trunk > Extension, edit the extension that is assigned to the phone.
  2. Click the Function Keys tab.
  3. Configure a function key to monitor the status of an extension.

    The following figure shows a configuration example of monitoring the extension 1004.

    • Type: Select BLF.
    • Value: Select the extension to be monitored from the drop-down list. In this example, select 1004.
    • Label: Optional. Enter a value, which will be displayed on the phone screen.
  4. Click Save.

Step2. Apply the configuration to the IP phone

  1. Go to Auto Provisioning > Phones, click beside the desired phone.

    The system prompts you whether to reprovision the phone.

  2. In the pop-up window, click OK.


  • The LED of the BLF key shows the real-time status of extension 1004:
    • Solid Green: The extension is being monitored, and the status is idle.
    • Solid Red: The extension is sending a call or is in a call; or the extension presence is DND (Do-Not-Disturb).
    • Flashing Red: The extension is ringing.
    • LED off: The BLF key configuration failed.
  • You can press the BLF key on the phone to achieve the followings:
    • Place a call to the monitored extension.
    • Pick up the monitored extension's incoming calls.