Supply and Fuse status outputs combined into one dual Opto-Isolator Design Circuit

Supply and Fuse status outputs combined into one dual Opto-Isolator Design Circuit. Reliability is a top priority for the designers of modern telephone and communications equipment. Designers take extra care to protect circuitry from failure by employing redundancy whenever possible, especially for power supplies. Supply voltages and fuses are monitored for early warnings of impending failure, often via a complicated array of precision components