The high-speed wireless network is still being built – Clearwire currently only offers service in Baltimore and Portland.
But nine further markets are due to be launched this year and up to 80 markets by the end of 2010.
The companies said that as part of their multiyear agreement, Clearwire has selected Cisco as its supplier of Internet equipment on a national basis.
Cisco is to build devices for Clearwire’s WiMax network targeted at consumers, small offices and home offices as well as small and medium-sized business and plans to introduce its first WiMax device later this year.
Scott Richardson, Chief Strategy Officer at Clearwire, said the agreement with Cisco would result in a robust and cost-efficient next-generation network designed specifically for delivering rich broadband services.
"In addition, Cisco plans to develop WiMAX technology for end-user devices, which will give consumers and businesses more compelling ways to stay connected through our CLEAR 4G service," he said.