[FrankJ]

Terminating resistor has nothing to do with the RS232 bus. It terminates the RS422 bus that is in the same plug. The other terminating resistor is in the unused port on the last Jag in the daisy chain (making a total of 2). The bus will mostly run without the terminating resisters, but will be subject to noise. It will also be the first troubleshooting question.

I found to get all the Jags to communicate that I had to power up the jags with them all connected & then restart the BCD-COMM com. A little concerning because it seems to me that the new jags should be recognized as they are plugged in.