FiberPlex FOM-1090 - Manual (Page 21)

Interface Conversion
A different interface may be selected at each end allowing the user to create a fiber link between two
electrically incompatible interfaces without requiring a separate interface converter. Simply set each unit to
the desired electrical interface and the conversion will happen automatically. Be sure to look carefully at the
pinout diagrams to know exactly what to anticipate in your cabling.
Crypto to Crypto Null Modem
A unique application is a crypto to crypto null modem, however a standard null modem cable does not work
due to specific clocking requirements. The FOM‐1090 has the capability to re‐route timing and controls
allowing this crypto to crypto operation while using standard straight‐through cables.