A twin-wire line over shielded twisted pair for simplex and duplex analog and digital single- and multi-span single- and multi-channel local and long-distance cable communications comprising on every improved span the repeatedly in turn grounded pair wires at first the one wire, than the other wire etc. The tool-holders or tools in these two positions are identically oriented, and the storage position and the receiver position are displaced with respect to each other along the spindle axis direction of the tool spindle. Timefrequency assignment is based on desired communication standards in conjunction with geographic mapping of adjacent stations to prevent interference between stations.