Seize a Line to Call

Seize-Line feature allows a user to set a BLF key to monitor the PBX trunk and press the BLF key to quickly place an outbound call through the monitored trunk.

Note:

Monitoring trunks by BLF key is supported on FXO trunk, GSM/3G/4G trunk, and SIP trunk, NOT supported on E1/T1 trunk and BRI trunk.
Seize-Line feature is not supported on SIP trunk.

Select the desired trunk in an outbound route.

Note: If the trunk is not selected in any outbound route, you cannot seize the trunk to call out.
1. Go to Settings > PBX > Call Control > Outbound Routes, edit an outbound route.
2. Check if the trunk is selected.
Configure Seize-Line setting.

Note: By default, PBX allows any extension users to seize a line to call out. You can decide whether to match route permission when seizing a line to call out.
1. Go to Settings > PBX > General > Preferences, check the option Match Route Permission When Seizing a Line.
2. Click Save and Apply.
On the Trunk configuration page, check the trunk name.
On the phone web interface, set a BLF key to monitor the trunk.

Note: Take Yealink T28P phone as an example.
1. Go to DSSKey > Memory Key, set a BLF key.
  - Type: Select BLF.
  - Value: Enter the trunk name.
  - Line: Select the account that has an extension registered to the PBX.
2. Click Confirm.
  - When the trunk is idle, the BLF LED is green.
  - When the trunk is being used, the BLF LED is red.
Seize the trunk to call out.
Press the BLF key to seize the trunk, you will get a dial tone, then dial the number that you want to call.