S.I. Tech, Inc. Asynchronous / Synchronous Optical Modem 2036

S.I.Tech Model 2004 optical, synchronous, simplex or full duplex Bit-Driver can be used for in-house process control or in-plant interconnection of a wide variety of EDP equipment. It has switch selectable internal clocking for 2400, 4800, 9600 and 19200 bps. There is an external clocking provision for up to 56K bps operation. Model 2004 is a stand-alone component complete with RS-232 interface, 120 volt line power cord, plus input and output transmission connections. This system utilizes small size, lightweight fiber optic cable which has complete immunity from -- and does not emit -- either electro-magnetic or RF radiation. It is not affected by high voltages, lightning, is non-conductive, and will not cause a sparking condition. This means the system can be used even in explosive and highly active electrical environment or for secure communi- cations, the transmitter and receiver are electrically isolated. Model 2004 is an inexpensive answer to dependable, error-less performance in highly congested, noisy equipment areas (Bit error rate ≤ 10E-9). It has status LEDs that indicate the presence of a carrier and data signaling over the communications path. It offers a RS-232 and transmission line loopback capability to verify link integrity and assist in hardware diagnostic problems. A build-in logic probe permits verification of true or false status of all RS-232 signals without a breakout unit.