This specification defines a common management interface for 4-lane pluggable transceiver modules, direct attach modules and shielded cable assemblies. Physical layer and mechanical details of the connector interface are outside the scope of this document.

适用于QSFP封装光模块，定义了硬件管脚，低速信号的功能，I2C时序等，做光模块开发、测试、认证必备资料。

SFF-8636协议，SFF光模块多源协议，用于初学者

SFF-8683 协议