CTTL had been granted following 12 authorizations by the governmental administrations till 2006:

National Telecommunication Metrology Station——Authorized by AQSIQ National Telephone Quality Supervision and Testing Center——Authorized by AQSIQ National Scientific and Technical Results Testing Appraisal Body for Telephone products ——Authorized by AQSIQ and the Ministry of Science and Technology China Testing Body for Network Access of Telecommunication Equipment——Authorized by MII National Laboratory for China Compulsory Certification (CCC)——Authorized by the National Administration for Accreditation and Certification (CNCA) Telecommunication Metrology Center——Authorized by MII Graphic and Text Communication Equipment Quality Supervision and Testing Center, MII ——Authorized by MII Mobile Communication Equipment Quality Supervision and Testing Center(Beijing), MII——Authorized by MII Telephone Switching Equipment Quality Supervision and Testing Center(Beijing), MII——Authorized by MII Posts and Telecommunication Industry Products Quality Supervision and Testing Center, MII——Authorized by MII EMC Test Center for Telecommunication Equipment, MII——Authorized by MII Anti-seismic Performances of Telecommunications Equipment Quality supervision and Test center, MII——Authorized by MII