TL9000标准共分两大部分、五个层次。 TL9000认证
The TL9000 standard is divided into two parts, five levels. TL9000 certification
TL9000认证两大部分为质量体系要求（Book One）和质量体系指标（Book Two）。
TL9000 certification two majority of quality system requirements (Book One) and quality system index (Book Two).
质量体系要求是在ISO9001：1994的基础上增加了对通讯电子产品质量体系的特别要求，并且针对不同的产品（硬件、软件和服务）提出了各自的要求；
Quality system requirements is the special requirements on communication electronic product quality system is increased on the basis of ISO9001:1994, and different products (hardware, software and services) put forward their own requirements;
质量体系指标中既有对所有通讯电子产品质量体系的公共指标，又为不同的产品（硬件、软件和服务）设立了各自的衡量指标。
Existing public index for all communication electronic product quality system quality system indicators, and for different products (hardware, software and services) set up a measure of their respective.
第一层为国际标准ISO9001：1994的要求；
The first layer is the international standard ISO9001:1994;
第二层为电讯业硬件、软件和服务质量体系的公共要求；
The public demanded second layer of telecommunications hardware, software and service quality system;
第三层为电讯业硬件、软件和服务质量体系的专门要求；
Particular requirements for the third layer is the telecommunications hardware, software and service quality system;
第四层为电讯业硬件、软件和服务质量体系的公共指标；
The public index fourth layers of telecommunications hardware, software and service quality system;
第五层为电讯业硬件、软件和服务质量体系的专门指标；
Specialized indexes fifth layers of telecommunications hardware, software and service quality system;