3 m connection cable ✓ The cable connects without interference a serial IBM AT interface with a switch box. All lines are connected 1: 1. DB9 crossover cable ✓ The ROLINE RS232 cable can be optimally used as an extension cable between two computers or two serial devices. D-Sub connector ✓ The connection cable has a male and a female connector. No modem must be connected. Double-shielded null-mode cable ✓ The PVC sheath provides an effective shielding of the signals and thus for interference-free transmissions. D-Sub connector with manual locking screws ✓ The VGA connectors are each 9-pin and sit firmly in the socket thanks to the screw connection.