ETSI TS 103 261-3规定了抽象测试套件（ATS）和部分协议实施额外信息 ETSI中规定的S6a接口上Diameter协议测试规范的测试（PIXIT）形式表 TS 129 272[1]符合相关要求和 ISO/IEC 9646-7[5]和ETSI ETS 300 406[6]。ATS中使用的测试符号为TTCN-3（见ETSI ES 201 873-1[7]）。以下测试规范和设计注意事项可在本文件正文中找到:总体测试套件结构；测试架构；测试方法和端口定义；测试配置；TTCN风格和惯例；部分PIXIT形式；包含TTCN-3 ATS的模块。附录A提供了部分实施额外测试信息（PIXIT）形式。附录B提供了ATS的抽象测试套件（ATS）部分。

ETSI TS 103 261-3 specifies the Abstract Test Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT) proforma for the test specifications for Diameter protocol on the S6a interface as specified in ETSI TS 129 272 [1] in compliance with the relevant requirements and in accordance with the relevant guidance given in ISO/IEC 9646-7 [5] and ETSI ETS 300 406 [6].The test notation used in the ATS is TTCN-3 (see ETSI ES 201 873-1 [7]).The following test specification and design considerations can be found in the body of the present document:the overall test suite structure;the testing architecture;the test methods and port definitions;the test configurations;TTCN styles and conventions;the partial PIXIT proforma;the modules containing the TTCN-3 ATS.Annex A provides the Partial Implementation Extra Information for Testing (PIXIT) Proforma.Annex B provides the Abstract Test Suite (ATS) part of the ATS.