Fluid... your in Left field! :) There is no input on the RP1. The only way to talk to it is via RF. I thought you had figured out something odd...

As for the cb4...

Have you tried making a RJ45 end on the output of the RP1 and plugging it into a CB4 port? Should work... in theory.... Just use Ground and Signal and leave power out of it...

Power...


If the powers both going to the connecting block that would screw it up.