Finisar's EPON sticks (FTEN2215P1CUN, FTEN2216P1CUN, and FTEN2217P1CUN) are SFP transceivers with a built-in 1G EPON ONU. They comply with IEEE802.3ah EPON standard. Digital diagnostics functions are available via the 2-wire serial bus specified in the SFP MSA. Finisar's FTEN221xP1CUN EPON sticks are compatible with the Small Form Factor Multi-Sourcing Agreement (MSA) and interoperable with standard-compliant EPON OLTs.