The digital diagnosis and monitor technology is the importance of the paper, the basic theory of design an optical transceiver with digital diagnosis function will be introduced firstly, which includes the I2C bus technology and the SFF-8472 agreement.

• 光模块的数字诊断与监控技术是本文介绍的重点,论文首先介绍了设计数字诊断光模块的理论基础,包括用于数字诊断光模块与主机通信的12C总线技术基础和定义数字诊断光模块技术要求与设计规范的SFF-8472协议。