I've been running an OMNI 07 with HRD using the serial port quite successfully for about 6 months because I could never get good TX audio with the internal TT modem. The TX audio with the RR modems is superb.
Not sure how close the Omni 07 is with the Orion but I would suspect if it will run with HRD with the serial port it should be possible to use the RR modems. I use program 4 which is generic to most rigs.
Be happy to supply any farther info off line.
Cheers!
Lloyd
VE3ERQ/VK4ERQ
