The QuickSwitch® 4192 fiber optic network switch allows a fiber optic device connected to the SC duplex COMMON connector of the unit to access any of four fiber optic networks connected to the A, B, C or D ports, or to disconnect completely from all output ports. The switch position can be changed either by depressing the desired front panel A/B/C/D/Off-Line pushbuttons, or by a device connected to the Remote port. Applying appropriate voltage to designated pins of the Remote connector will cause the switch to change position.