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CHAPTER 2: Description
2. Description
2.1 General
The Async Fiber Optic Mini Modem is used for local
data distribution, connecting full- or half-duplex async
computers and terminals. A pair of modems ensures
integrity of data transmission over fiberoptic cable at
distances up to 2 miles (about 3 km).
The Modem features a switch-selectable DCE/DTE
option. This allows operation as DTE, for connection to
another DCE such as a multiplexor port, eliminating the
need for a cross cable. The carrier can be strapped for
either continuous operation, or for switched operation,
controlled by the RTS signal, for transfer of a control
signal end-to-end.
Innovative circuitry allows the Modem to operate
without connection to the mains power supply, by
using ultra-low power from the data and control signals.
The Modem operates even if only transmit data is
connected—no control signals or any other source
of power are required.
