You should start the audio monitor to capture the audio wave file on the terminating side. After that, use an audio diagnostic software such as CoolEdit to check if the received ring cadence is the same as the configured ones. You may want to change the Ring Cadence pattern configured in the SUT, or check with the vendor of the SUT why a different cadence is sent. Lastly, if you are not really concerned about the ring cadence, you may configure a Wait for Incoming call -Any Ring in the Action management.