ALLENTOWN, Penn., Oct. 30 -- Circadiant Systems Inc., an optical networking testing equipment company, announced today it has secured an investment from Intel Capital. Circadiant announced on Sept. 10 that it received $10 million in second-round financing. The new capital will help the company accelerate the growth and deployment of its products and services. Testing equipment is one segment of the optical networking market expected to experience steady growth over the next three years. According to Frost & Sullivan, the optical testing market is currently estimated at $2.3 billion and expected to grow to nearly $4 billion by 2004. Circadiant is introducing a new class of test equipment, designed for current and future market needs, that will help optical equipment and component vendors enhance productivity, ensure product quality and decrease time-to-market.