The TTCN language is a part of the ISO/IEC 9646 conformance testing framework and is specially designed for the specification of tests of communication systems.
Concept: abstract test suites:
Description of a set of tests that should be executed for testing an IUT (Implementation Under Test) together with the relevant data declarations. The test are described using a black box model. The messages can be defined using either TTCN-Type notation or ASN.1.