ISO/IEC 9314的这一部分包含光纤分布式数据接口的抽象测试套件 (FDDI)令牌环媒体访问控制(MAC)层协议。开发了这个测试套件 基于OSI一致性测试方法和框架中定义的原则 （ISO/IEC 9646），并以树和表格组合符号(TTCN)编写，旨在用于 测试任何FDDI站是否符合MAC标准（ISO/IEC 9314-2:19 89）。 测试方法是ISO/IEC 9646中描述的“远程单层测试”。The 抽象测试脚本指定要交换的MAC层协议数据单元(PDU) 在两个MAC实体之间，测试器上的MAC和实现上的MAC 测试中（IUT）。该测试仪称为下测试仪(LT)。 测试套件不需要使用任何更高层的协议，也不假设 IUT上存在逻辑链路控制（LLC）层实现。然而，它预计， 站管理(SMT)功能在IUT上可用。因为MAC本身 不产生任何数据帧，测试仪使用SMT测试MAC的处理能力 通过向SMT发送帧并观察SMT发起的响应帧。 预期试验在受控环境中进行，最低限度 配置（图1）:具有两个站的令牌环，一个是LT，另一个是IUT。

This part of ISO/IEC 9314 contains the abstract test suite for the Fibre Distributed Data Interface (FDDI) token ring Media Access Control (MAC) layer protocol. This test suite was developed based on the principles defined in OSI Conformance Testing Methodology and Framework (ISO/IEC 9646) and written in Tree and Tabular Combined Notation (TTCN), and intended for testing conformance to the MAC standard (ISO/IEC 9314-2:1989) of any FDDI stations. The test methodology is the "remote single layer test" as described in ISO/IEC 9646. The abstract test scripts specify the MAC layer Protocol Data Units (PDU) to be exchanged between the two MAC entities, the MAC on the tester and the MAC on the Implementation Under Test (IUT). The tester is called the Lower Tester (LT). The test suite does not require use of any higher layer protocols, nor does it assume existence of Logical Link Control (LLC) layer implementation on the IUT. It expects, however, that the Station Management (SMT) function is available on the IUT. Since MAC itself does not originate any data frames, the tester uses SMT to test the processing capability of MAC by sending frames to SMT and observing the SMT originated response frames. The testing is expected to be conducted in a controlled environment with a minimum configuration (figure 1): a token ring with two stations, one being the LT and the other the IUT.