Finisar's FTRJ1321P1BTL SFP transceivers are compatible with the Small Form Factor Pluggable MSA . They comply with SONET OC-48 SR (SDH STM I-16) standards, Gigabit Ethernet and Fibre Channel, and additionally they are compatible with SONET OC-12 and SONET OC-3. Digital diagnostics functions are available also via the 2-wire serial bus.