Make sure you lower your audio buffer sizes to reduce turnaround latency . This will increase you CPU usage through, try not to go over 60% cpu usage. Are you getting it to send OK, just not getting recognized by the responder?
Please post your setup here: - What kind of cable are you using between your PC and the SCS PTCIIpro? - What are you using, a PC or a notebook? - Your PC to PTC connector? RS232 direct or RS232 to USB adapter?
1. You'll need a good connection to the SCS RS232. Not all adapters work. 2. The audio /PTT cable between the SCS and the Flex3000 connects to the FlexWire. I built it myself. 3. On the Flex-3000 setup you must choose the FlexWire connector