Share Trunks by SLA

After setting up SLA stations on PBX and configuring BLF keys on IP phones, users can monitor SLA trunks, receive calls from SLA trunks, and make outbound calls through SLA trunks.

Make outbound calls

SLA station can monitor the status of SLA trunk according to BLF keys status.

Note: For different phone models, there may be some difference in the status of BLF keys.
  • If the BLF key used to monitor SLA trunk turns green, it indicates that the trunk is available, and the associated SLA station can make outbound calls through this trunk.

    To make outbound calls, the SLA station should press BLF key first, and dial the external number out after hearing a dial tone.

  • If the BLF key used to monitor SLA trunk turns red, it indicates that the trunk is in use. Other SLA stations can not use the trunk to make outbound calls now.

Handle incoming calls

When an external call reaches the SLA trunk, all phones of associated SLA stations will ring, and BLF keys on phone devices will flash in red. Any SLA stations can answer the call by pressing BLF keys.

Barge-in an active call

If Allow Barge is enabled for an SLA trunk, other SLA stations are allowed to join an active call.

When an SLA station is in a call with other users using this SLA trunk, other SLA stations can join the active call by pressing the BLF key.

Hold and retrieve calls

During the call, the SLA station can press the BLF key to hold and retrieve the call. Whether an SLA station can retrieve a call or not depends on the Hold Access.
Note: Hold Access of SLA station has a higher priority than the Hold Access of a trunk.
  • If Hold Access is set to Open, other stations that share the trunk can press BLF key to retrieve the call.
  • If Hold Access is set to Private, the call can be retrieved only by the station that previously put the call on hold.