no rs232 serial, but network ok.

It should be a null modem cable, not rs232.
look here : http://www.aggsoft.com/rs232-p…/nullmodem-db9-to-db9.htm

Quote from ben361

It should be a null modem cable, not rs232.
look here : Null modem cable (DB9-DB9). Pinout and signals for building a serial (RS232) nullmodem cable

null modem cable is infact a rs232 cable, the cable is actually called a rs232 db9 null modem cable. There are about 5 different types of the rs232 its just the way there wired which stipulates which one it is as the cables go to different pins.