Other broadband contracts forbid home users from logging onto virtual private networks (VPNs), needed by telecommuters to access their workplace networks from home. And, until the FCC intervened last year, Madison River Telephone Co., which serves rural counties in Illinois and several Southern states, blocked subscribers from using Vonage's VOIP service. The wireless company Clearwire, in Kirkland, Wash., blocks broadband services — such as streaming video or VOIP — that use a lot of bandwidth, and broadband providers have successfully lobbied for laws in nine states limiting how broadband consumers can use their own computers.