Prolite PL-M2014R Cable ConstructionI purchased a 25 foot, straight-thru, 6-pin RJ12 cable and a 6-pin RJ12 to female DB9 adaptor kit. The cost for both together was under $5 at MicroCenter.
Using a Cross Over RJ12 CableYou can tell that you have a cross over (and not straight through) cable by putting the cable end to end, pins up, and confirming the colors don't reverse order.
Wiring the RJ12 to DB9 AdaptorAssuming you have a cross over cable...
Connect the green wire to pin 2, the red wire to pin 3, and the yellow wire to pin 5. Be sure to push the pins into the back of the female receptical until none of the connector metal is visible.
Don't Panic: If you have a straight through cable, then you can still construct an adaptor, you just have to account for the reserved wires. Here's how:
Adaptor Information from Pro-LitePro-Lite has decided to publish how to build the cabel on their web site as well. Here's the Tru-Color II Serial Port Assignments.
ALPHA/BetaBrite UsersIf you have an Alpha or a BetaBrite sign, you cannot use this adapter! Instead, see the Alpha sign cable adapter construction instructions.
Connect to the ComputerFasten together the adaptor, plug the RJ12 into the message board and the other end into the adaptor, then connect the adaptor to a communications port on your PC.
To communicate with the ProLite PL-M2014R, you
should set the baudrate