Original Synscan cable, RJ12 end:
RJ12 pin#1 Blue
RJ12 pin#2 Yellow
RJ12 pin#3 Green
RJ12 pin#4 Red
RJ12 pin#5 Black
RJ12 pin#6 White
RJ45 end:
RJ45 pin#1 Not Used
RJ45 pin#2 White
RJ45 pin#3 Not Used
RJ45 pin#4 Black
RJ45 pin#5 Red
RJ45 pin#6 Yellow
RJ45 pin#7 Green
RJ45 pin#8 Not Used
So in the original Synscan cable, from RJ12 to RJ45 the pin connections are:
RJ12 pin#1 to RJ45 N/U
RJ12 pin#2 to RJ45 pin#6
RJ12 pin#3 to RJ45 pin#7
RJ12 pin#4 to RJ45 pin#5
RJ12 pin#5 to RJ45 pin#4
RJ12 pin#6 to RJ45 pin#2
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