Fixed frequency, DSSS, and FHSS radios can all be used in an industrial environment, but in an identical high-interference industrial environment, the fixed frequency would be most vulnerable, the DSSS would have a limited tolerance, and the FHSS would have the highest tolerance. The need to reduce operating costs is making wireless more attractive than buried cable and running conduit in manufacturing plants. With industrial applications, the design requirement is that the radio must work 100 percent of the time to provide coverage and reliability. To determine whether a cable and conduit system can be replaced with an equally reliable new technology, the prospective implementer must first analyze environments, file size, speed, and security considerations. The fixed frequency radio is very reliable in 'an ideal world,' while the spread spectrum (SS) radio must be either a frequency hopping or direct sequence design, and the FCC does not regulate the frequency band or guarantee interference-free operation. Direct Sequence Spread Spectrum (DSSS) can move data at higher baud rates, but spreads power over many frequencies, so there is more possibility of interference. Frequency Hopping Spread Spectrum (FHSS) constantly changes frequencies pseudo-randomly throughout the 901MHz to 928MHz bandwidth, and has a high tolerance for interference. Performance decreases as interference across the operational frequency band includes, so small files of redundant data can transmit repeated on a FHSS.