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User Features The front panel of the RMX module has eight LED indicators, a toggle switch that can be used to manually request a role switch, and an optical transceiver. Role Switch The Role switch is a spring loaded two-position switch that rests in the OFF state. When the RMX module is being used as a redundancy link, this switch allows you to manually switch control from the active controller to the backup controller. To initiate the switching of roles, lift the switch to the ON position for at least 1 second. The role switch state is de-bounced and filtered to prevent accidental activation. When the RMX module is used as a node in a generalpurpose reflective memory network (i.e. not used as a redundancy link), the Role switch has no effect on module operation. Optical Transceiver The optical transceiver has two “LC” type fiber optic ports. The port labeled “TX” is the transmitter and the port labeled “RX” is the receiver. Memory Xchange modules are networked together using either simplex (single fiber) or duplex (dual fiber) multimode fiber optic cables. The specific cable construction depends on your operating environment. For details on fiber optic cables, refer to the PACSystems RX7i Memory Xchange Modules User’s Manual, GFK-2300.