http://k5fr.com/DDUtilV3wiki/index.php?title=SPE_1.3/2KPort Connector
Port (DB9M) PC (DB9F)
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TX232 / 7 <-----<-----< 2 / RX PC
RX232 / 8 >----->-----> 3 / TX PC
Gnd / 5 ------------- 5 / Gnd
Band Switching
Cat (DB15M) PC (DB9F)
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TX232 / 9 <------------< 2 / RX PC
RX232 / 1 >------------> 3 / TX PC
Gnd / 4 -------------- 5 / Gnd
