Hi Nick,
Although Mike's suggestion to buy the Webswitch would be a super solution, you can also
just use the RRC COM1 ports to carry the rotor serial signal between the two RRC's without
any additional hardware. Then you can connect COM1 to your remote PC using either USB
or a standard serial cable and start any rotor control program using that serial port to control
the rotor that way.
This method has the bonus of allowing you to click and move the antenna to the correct
direction if using an integrated CAT software solution, such as HRD, TRX-Manager, etc.
The solution Mike suggested offers a nice web-based interface to control the direction instead.
73,
Mitch DJ0QN / K7DX
Milk