The second new market that is available for modular DC/DC converters is the telecom industry. Telecom applications also have some unique requirements, wide input voltage range, high operating temperature and low EMI noise. In the highly competitive telecom market, being able to accept different DC voltage sources is a must, so a converter designed to run from 24 V must also work at 12 V or 28 V. Most telecom products are enclosed in multiple equipment racks with limited air flow and high ambient temperatures, requiring a high operating temperature DC/DC converter. Lastly, it is necessary for radiated and conducted noise to be reduced to low levels, so that complex systems can be built up without cross-interference concerns.