GTCO Surface-Lit AccuTab - Users Guide - Manual (Page 33)

Surface-Lit AccuTab 33
straight-through cable that is wired pin-to-pin (i.e., 1 to 1, 2 to 2, etc.). This figure shows
such a cable. The AccuTab Controller is typically connected in this manner using the cable
supplied by GTCO CalComp by Turning Technologies.
Connecting DTE to DTE, or DCE to DCE, may require a different strategy to get the data on
the correct wires. The below figure shows a cable that can work in this situation. It is called
a null modem cable and it fools both devices into thinking they are talking with the right
kind of receiver. This cable routes Pin 2 to Pin3 and Pin 3 to Pin 2.