The beginning of communication in the past Caused by the creation of transportation routes and trade routes With easy communication Both through the merchants, using the speed horses until the establishment of fast people according to the important cities It is considered a development of simple news delivery, one way, and this has been until the early Rattanakosin period.
From government policy that wants to transform state enterprises In order to increase the work efficiency to the private sector, which CAT is one of the enterprises that have to follow the said policy On July 8, 2003, the Cabinet passed a resolution to convert CAT in accordance with the Telecommunications Development Master Plan. And the State Enterprise Capital Act, BE 2542, split into 2 companies, namely Thai Post Company Limited and CAT Telecom Public Company Limited, which was incorporated as a company on August 14, 2003.