This European Telecommunication Standard (ETS) defines a set of detailed tests of the Signalling System No.7 Message Transfer Part (MTP) level 2 and level 3 protocol. These tests intend to validate the protocol specified in ETS 300 008-1 [1]. This ETS conforms to ITU-T Recommendation Q.780 [2] which describes the basic rules of the test specifications@ however@ it contains additional general principles specific to level 2 and level 3 tests@ respectively.