This 25-pin D-type connector with sockets (DB25S=female) is used to
interface to RS-232-C standard signals.  Signal names correspond to those
used in other places in this appendix, when possible.

   WARNING:
   --------
   Pins on the RS232 connector other than these standard ones described
   below may be connected to power or other non-RS232 standard signals.
   When making up RS232 cables, connect only those pins actually used
   for a particular application.  Avoid generic 25-connector "straight-
   thru" cables.

 pin assignment (j6) 
 timing 
 electrical characteristics