ATOP’s AP-ST2X1A Copper Small Form Pluggable (SFP) transceivers are based on the SFP Multi Source Agreement (MSA), They are compatible with the Gigabit Ethernet and 10/100/1000BASE-T standards as specified in IEEE Std 802.32. The transceiver physical layer IC (PHY) can be accessed via I2C, allowing access to all PHY settings and features. They are RoHS compliant and lead-free.