Adding internal contacts on your phone – Gamma Horizon

In this post we explain how you can add internal contacts to your phone when using Gamma Horizon.

Go to and login - (Log in details would have been emailed to each user).

  1. Go to "Call Setup" > "Advanced" > "Busy Lamp" (as shown in the image below.)
Internal contacts added gamma horizon

3. The available contacts will show in the left pane. Check the check box then click the "Add Selected" box.

4. The added contacts will show in the right pane now. Once you have selected all the contacts you need, click the "Save" Button.

  • Your device may do a reboot and can take a while sometimes for the contacts to display on your handset.