Pinout for the RS-232 cable for the WS-2310/15/17

On RJ-11 Side (clip down, telephone style connector)
From left to right looking down on the connector
Color: Blue Brown Green White

On the 9 Pin D-Shell (PC Interface)
Signal: RTS RXD TXD DTR
Pin...: 7 2 3 4

So Blue -> Pin 7, Brown -> Pin 2 etc.

Note that there is NO connection
to the RS-232 ground (pin 5)!!!