About us

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TOT has laid a foundation for telecommunications system in Thailand for over 60 years. With its long-lasting experiences, TOT is ready to provide a complete range of telecommunications services to meet therequirements of all target groups to their utmost satisfactions. TOT Innovation Institute is a principal division of TOT Public Company Limited, formerly Telephone Organization of Thailand. For the time being, TOT is the abbreviation for Telecom of Thailand. One of the most significant subdivisions in TOT Innovation Institute is the Testing and Calibration Services Sector.

TOT calibration laboratory was established in 1969, initially serving and facilitating a company in response to rapid innovation. Our calibration laboratories are accredited to ISO/IEC 17025 : 2005 No. 0070, thereby confidently ensuring accurate and precise measurements. In essence, basic calibration services include a wide range of measurement instruments calibration: electric and fiber optic. The calibration comprises both working instruments and related components. Regarding the utmost importance of revolutionary advances in telecommunications, we have rigorously enhanced our depth and breadth of such leading-edge technology competencies to perform impeccable calibration and to strive for superior quality assurance of your services and products. Besides, customer satisfaction can be guaranteed as there are on-site calibration and pick-up and delivery services.