BlueOptics BO08C28S1 1000BASE T SFP.pdf
SFP 1.25G RJ45 100M
RoHS Compliant Copper Transceiver
Circuit ground is connection chassis ground.
It is pulled up within the module with a 4.7k~10kΩ resistor. Voltage is between 2.0V and 3.6.
MOD_DEF(0) indicates if module is plugged in.
LVTTL compatible with a maximum voltage of 2.5V.
Pinout of Connector Block on Host Board