Domestic Thailand has led calls for the first year in the reign of 2424 5 installed in Bangkok and Samut prakan province using the phone in the first phase is a phone system or power system, the Bunny Mag serial 2450 CHUM b.e. telephone line, the first of its kind in the country Thailand. Installation of the system at the central telephone Office (WAT liap) is a telephone using employees, middle (Central Battery: CB) is a semi automatic switching later 2478 b.e. began using the system Step by Step switching and b.e. 2497 telephone organization of Thailand to establish with Thailand to provide phone service, 1976.2502 cross started using saba phone switching Installing for the first time in the country that Thailand Chonburi switched 1976 2520 started using the phone button-press to come first in the metropolitan area year b.e. 2526-enabled telephone switching system first used at SPC switching Phuket 2540 b.e. modify phone system crossbar (carousel) is a system s PC (press the button) all. Subsequently, July 31 b.e. 2545 telephone organization of Thailand Thailand convertible. Companies such as @ public Corporation (TOT Corporation Public Company Limited), and July 1, b.e. 2548 renamed. Tot public company limited (TOT Public Company Limited) B.e. 2548 August 4 receiving telecommunications licence which is one and a third from the National Telecommunications Commission, or NTC.
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