Thanks for the info and explanation on "COM4 OK"
You were correct that I had selected KISS rather than Simply(KISS). Created a new port using Simply(KISS), [and deleted the old one] and PERMed INTFACE KISS into the KPC2. Appears to be working on RF channel as well as Internet now.
A lot to learn in switching software.
Thanks for your help and your work on this.
Dave - W9PFD