The trunk local computer network LOPOS was of the token bus type and for transmission it used a coaxial cable with a maximum length of 500 m, the maximum number of connectable stations was 64, the transmission speed was 500 kbit/s. The AKM-SZ module was implemented on the basis of a U 880 microprocessor with a clock frequency of 2.5 MHz and an internal memory of 64 KB; cooperated with the system on the common bus (UNIBUS) in DMA mode. It was implemented on one 2/3 SMEP board.