The 1U fiber optic network access control A/B switch is a non-latching full-duplex optical switch. It is used to control network access via front panel slide switch or remotely using dry contact closures. The dry contact closure remote interface can be connected directly to SecureSwitch revision B switches to automatically connect the appropriate RS530 or Ethernet fiber optic media converter in hybrid IP/ISDN VTC applications.
The A/B Switch operates with a unique switching mechanism. When you connect (short) Pin 1 to Pin 2 on the terminal block located on the back of the unit, the internal optical mirror mechanism will provide a connection path between the Common port and port B. The front panel B LED will illuminate to indicate that the connection path is B. If power is lost, or if the Pin 1 to Pin 2 connection on the terminal block is removed, the Fiber Optic Network Access Control A/B Switch will revert to the Common port to port A connection state.
The slide switch on the front panel operates in parallel with the rear panel terminal block contacts. When the slide switch is in the ON position, the internal optical mirror mechanism will provide a connection path between the Common port and port B, and the front panel B LED will illuminate to indicate that the connection path is B. When in the ON position, the slide switch also provides a connection between pins 1 and 2 on the terminal block. This feature could be used to activate a set of remote contacts on a secondary device.