Thiel certification is carried out by the Thiel Certification Center.

The Tell Certification Center (TLC for short, the former Posts and Telecommunications Quality System Certification Center), affiliated to the Telecommunications Research Institute of the Ministry of Information Industry, as a management system certification and product certification organization for the post and telecommunications profession, passed the China Qualified Certification on December 20, 1996. The assessment and accreditation of the National Accreditation Service for Assessment (CMAS) was officially approved and registered by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China on December 26, 1996 (the national registration number is SC27). At present, CNAS has participated in the international multilateral mutual recognition agreement, which means that the quality system certification with the CNAS accreditation mark issued by TLC can be obtained by most developed countries (such as the United States, Japan, Germany, the United Kingdom, France, the Netherlands, Italy, etc.) and Accreditation by some developing country accreditation bodies.

On August 1, 2002, the center passed the re-confirmation of agency certification qualifications by the National Certification and Accreditation Administration (CNCA). The approved business scope is: quality system certification, post and telecommunication product certification. The approval number of the certification body is: CNCA-R-2002-030, and the approval number of the certification training organization is: CNCA-P-2002-065. Accordingly, the Tell Certification Center completed the "Business License for Enterprise Legal Person" on January 17, 2003 " of the business registration.

At present, TLC has passed the recognized quality management system certification business scope: 13 rubber and plastic products, 17 basic metals and metal products, 18 machinery and equipment, 19 electrical and optical equipment, 31 transportation, warehousing and communication industry, 32 financial intermediary , real estate and leasing, 33 information technology; around these business scopes, TLC carries out management system certification according to GB/T19001-2000 standards.

TLC also conducts voluntary product certification for the following fifty-six categories of communication products: communication power supply - AC stabilized power supply, DC-DC module power supply, DC-DC conversion equipment, inverter equipment, diesel generator sets, gas turbine generator sets , Solar power supply combination power supply, high frequency switching rectifier, high frequency switching power supply system, uninterruptible power supply for communication, DC power distribution equipment, AC power distribution equipment, power distribution cabinet, battery, mobile phone charger; communication cable - communication Optical cables-communication optical cables, communication cables, digital communication cables, coaxial cables, flame-retardant and fire-resistant flexible cables, cable splices, plastic pipes for underground communication pipes, single-mode optical fibers, multi-mode optical fibers, optical fiber composite overhead ground wires, installation Supporting pipe; wiring equipment - main distribution frame, digital distribution frame, optical fiber distribution frame, optical fiber distribution frame/box/cabinet, cable junction box, cable junction box, cable junction box, optical cable junction box , Optical cable splice box, optical cable terminal box, optical fiber active link, integrated distribution frame, radio frequency link, integrated distribution box for broadband data communication, security unit, optical fiber distribution box product certification.