An update. I used the configured TS2000 jumper module. The situation is now back to square one. I have no red LED on the RSS. When I click on the monitor GUI, the PTT illuminates sometimes but never keys the transmitter. I have double checked cables. I can "see" the serial port is working using "lsusb" at the command prompt. I can control radio ON/OFF, change frequencies, bands, modes. I have checked the settings on the radio and they seem to be in compliance with suggestions.
What do I do next? My plan is to remove all cables and connections from the TS2000 (there is a connection to a TR switch) among a couple of others. I will then connect ONLY the RSS (serial and audio) and see what happens.
If anyone has any other suggestions, please bring them forward.