Major Carriers Using Linux (Score 3, Interesting)

I've been involved in many Large carrier switch control application platforms being delivered using Linux since 1994. Sprint was an early adopter in Asia. Hutchison Telecom also used Linux in their cellular network application switching platform. British Telecom deployed a worldwide unified messaging platform in 2000 that was controlled by Linux in the U.S.,U.K.,Japan, Australia, Norway, Spain, Italy and Germany. NTT used a Linux controlled calling card platform in Japan that ran well over 20,000,000 minutes per month. Embratel and Worldcom deployed the first carrier installed calling card platform in Brazil in 1999/2000 that was running a Linux based switch control platform. If I remember correctly the platform at Hutchison made it over 400 days without a reboot.