[4] CAT provides data communications and applications services, such as leased line, Fiber-to-the-Premises, Gigabit Ethernet, xDSL, live TV broadcast, e-Commerce, e-Auction, and e-Security.

CAT Telecom Public Company Limited (Thailand) was established on August 14, 2003, by the government of Prime Minister Thaksin Shinawatra.

[6][7] Soon after the coup, the junta of General Surayud Chulanont announced plans to merge CAT with rival state telecom enterprise TOT (Telephone Organization of Thailand).

The junta appointed General Saprang Kalayanamitr as the new chairman of the board of directors for both CAT and TOT.

The Surayud government's excise tax cancellation meant that TOT and CAT would receive their full concession payments.