Spread Spectrum Radio
Unlicensed spectrum
- FCC Title 47 (Telecom), Part 15 (RF), Sections 247 & 249 (Industrial, Scientific, & Medicine,ISM bands)
2.4 GHZ band preferred
- less loss & noise than 900 KHz, longer distance, less susceptible to rain and cheaper than 5.7 GHz
Frequency-hopping or direct sequence
May be important for inter-enterprise (ISP, xLEC) where copper is not available