🔌 Seize a Trunk to Call Out by BLF Key

This topic describes how to configure a BLF key on your IP phone via Auto Provisioning to monitor the PBX trunk, and press the BLF key to quickly place an outbound call through the monitored trunk.

Prerequisites

• A phone is connected to IZT Cloud Voice via Auto Provisioning, and has been assigned with an extension.

For more information, see Auto Provision IP Phones.

Procedure

• Step 1: Set up a function key for trunk monitoring
• Step 2: Apply the configuration to IP phone

Step 1. Set up a function key for trunk 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 a trunk.

The following figure shows a configuration example of monitoring the trunk peer-trunk-66.41.

• Type: Select BLF.
• Value: Enter the name of the trunk to be monitored. In this example, enter peer-trunk-66.41.
• Label: Optional. Enter a value, which will be displayed on the phone screen.

4. Click Save.

Step 2. Apply the configuration to IP phone

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

The system prompts you whether to reprovision the phone. 2. In the pop-up window, click OK.

Result

• The BLF key shows the real-time status of the monitored trunk:
• Green BLF LED: The trunk is being monitored, and the status is idle.
• Red BLF LED: The trunk is busy.
• BLF LED off: The BLF key configuration failed.

Press the BLF key to seize the trunk, you will get a dial tone, then dial the number that you want to call.