HG819-00PU2-100IPEX HG821-00PU-100IPEX HG821-03PU-GPS HG821-3PU-100IPEX HG821-3PUSQ-100IPEX HG8245 EPON HG8245 GPON SFP(H248) HG8245F E8C for EPON HG8245R HG8245R EPON BOB