This system is designed to exchange the telephone lines: hot line, magnetic, E1×64, N (V35/V36), and E & M Ethernet between the local unit and remote control. Exchange interface is a pair wire (via the GSHDSL) or fiber optic (in the point to point mode or STM1 loop). Also connection can be made via the E1 output using radio. This system includes two local boxes and remote control that are connected to each other via the TDM multiplexer and PCM with the fiber optic carrier. The system is equipped with 22 general slots for connecting to different ports.