So far, control processes and communication at high transmission speed between 2 control computers or between a PC and a control computer have been limited to short distances only.

The two-wire technology in combination with 2 modems has recently allowed to bridge distances of up to 1000 m in length at a data transmission speed of 10 M-byte/ sec.
The needed cable is not subject to special requirements. Therefore, you can also use free copper wires from multi-core valve cables for setting up this communication.