Type change station n, where n is the extension of the backup telephone. Press Enter.
The system displays the Station screen.
In the COS field, assign the COS that you created for the console permissions.
Click Next until you see the Feature Button Assignments area.
In the Feature Button Assignments area, assign atd-qcalls to an available button.
The atd-qcalls button provides visual alerting for this telephone. When the atd-qcalls button:
Is dark, the attendant queue contains no calls
Shows a steady light, the attendant queue contains calls.
Shows a flashing light, the number of calls in the attendant queue exceeds the limit that you set for the queue. At this point, the backup telephone user also hears an alert signal.