- Connects two PCs via the serial interface, whereby the cable acts as a null modem- Two 9-pole D-Sub sockets- Connector casing moulded with special plastic, so optimal strain reduction, cable break not possible- Very good screening prevents data loss and electromagnetic interference9- pole F: 1|7|2|3| 4 |6/8|5|99- pole F: 7|1|3|2|6/8| 4 |5|9