The Intercall FJB2 provides four ‘spur’ outputs from the network spine with each output incorporating an over current/voltage and reverse polarity protection device. A front panel mounted red/green LED indicates the condition of the internal fuses and continuously monitors the network data signals. Individual fuse failure LEDs are mounted on the reverse of the unit and in the event of cable fault, on one of the outputs, the ‘spur’ will be isolated without disabling the entire cable network.