If anyone wants to try RTTY over VOIP dial (304) 250-1300.

The tones were created using minimodem and I uploaded the WAV file to my

voip.ms account.

If you dial the above number the IVR will play the file.

I have no idea what codec is used.

I don't have that much control over the IVR.

The RTTY app on my Android is decoding it just fine.

-Steve