When you receive a call with Other Phone mode active:
Both your Avaya Workplace Client and the other phone device alert.
In your Avaya Workplace Client you can view details about the call in the incoming call notification.
You can answer the call using the other phone device. The answer button in Avaya Workplace Client is inactive.
You can use the decline button in Avaya Workplace Client to decline the call. The call stops alerting on both devices.