ATOP’s APSP31B33xDL20 Small Form Factor Pluggable (SFP+) transceiver is
compatible with SFF-8431,SFF-8432 and supports 10G Ethernet LR and 10G Fibre
Channel .It is designed for 10G-Gigabit multi-rate links up to 20km of G.652.
Digital diagnostics functions are available via a 2-wire serial interface, as specified
in SFF-8472.