Michael K Lavine, Age 6398 Badger Hill Dr, Milford, NH 03055

4523099, Jun 11, 1985

Apr 29, 1983

6/489769

Michael K. Lavine - South Hadley MA

H04B 900

250551

A monitoring system is disclosed in which fiber-optic cables are used with sensors, e. g. , a temperature sensor, to transmit analog data from the sensors in binary form to a receiver. The binary information is then analyzed by a microprocessor, which is attached to the receiver, to monitor the system. The purpose of the fiber-optic cables is to ensure the isolation of the transmitted data from surrounding electrical noise and natural phenomena. That noise tends to distort the transmittal of such sensor data in prior systems which use hard wires instead of fiber-optic cables. Unlike prior systems in which a fiber-optic light source known as an "L. E. D. " (light-emitting diode) is normally kept "on", the main feature of this system is that its L. E. D. is normally kept "off" and is turned "on" only when information is desired. This greatly increases the life of the L. E. D.