Connect to your IP phone using either tool:
Viking IP Programming -- “Alarm/Firmware” tab
click on the “test mic/speaker” button - hear beep from unit
“passed” appear in the result field afterward
Viking Device Manager -- right-click and select "Diagnostic"
select desired device
click "Test Mic / Speaker" - hear one beep from unit
see Mic/Speaker Result" on screen
This test can only be performed when the IP phone is registered and the current alarm status is idle.