Summary:

The ML4066-SFPDD is a general-purpose diagnostic adapter, which allows the user to access all SFP-DD controls, alarms, I2C signals, and power nets. A pin header connector that breaks the connection between the “Plug connector” and “Host connector” is used to access SFP-DD pins individually, or, when using jumpers, allows to connect the plug connector to the host connector pins. This pin header connector is also used to connect the I2C analyzer.