Recommendation ITU-T Z.166 specifies the control interfaces for TTCN-3 test system implementations. The TTCN-3 control interfaces (TCIs) provide a standardized adaptation for management, test component handling and encoding/decoding of a test system to a particular test platform. This Recommendation defines the interfaces as a set of operations independent of a target language.
ITU-T Z.166-2015 history
2015ITU-T Z.166-2015 Testing and Test Control Notation version 3: TTCN-3 control interface (TCI) (Study Group 17)