Fiber-optic modem
The Model 8277 is a fiber-optic modem with a universal interface, packaged for use in any application using the din rail concept. The modem provides switch-selectable interfaces for RS-232, RS-422, and RS-485. The RS-485 interface can be additionally configured by the user to operate either half- or full-duplex on two or four wires. RS-485 options also include enabling the fiber transmitter from rts or data. The electrical interface appears on a DB-9 female connector, which is wired in accordance with the standard for the PC com port. The fiber port of the modem uses ST connectors to accommodate multimode fiber. The operating wavelength is 850 nm and the power budget is 12 dB for operation over fiber distances that exceed 2 km. The modem sells for $249.
Telebyte Technology Inc.
Greenlawn, NY