The Spread Spectrum (unlicensed) is available in 900 MHz, 2.4 GHz and 5.8 GHz. The Spread Spectrum is suitable where some interference may be acceptable (typically voice only circuits), the structures are very close together or in a very remote area. Unlicensed microwave links provide an economical solution for connecting offices with up to 50Mbps bandwidth on non-critical links. Where low cost service is required and where line-of-site is available between sites.