transmission system for digital signals.

Signal transmission system suitable for the transmission of digital signals by pairs of transmission lines twisted together. A main transmission circuit and a subordinate transmission circuit are disposed respectively to the switching system and the terminations of the transmission line. These two circuits are provided with a transmission circuit and a receiving circuit, the transmission circuit comprises an integrating circuit connected to a constant current generator and the receiving circuit comprises an automatic factor adjusting circuit amplification and adaptive equalizer connected between a different amplifier and a signal slicer circuit.