hi would you please check this serials ?FDO1920F1VT  FDO1920F1RW   related cisco  SWITCH WS-C3750X-12S-EFDO1644X067   FDO1624Z17Y   related cisco  SWITCH WS-C3750X-24S-EFCZ15337OTY OR FCZ153370TY  related cisco3945/K9 original or fack ?are these oem...

hi would you please check this serials ?FNS17041MG7 FNS17041MFM FNS17041976 related cisco GigabitEthernet Transceiver Module GLC-LH-SM GigabitEthernet Transceiver Module GLC-LH-SMoriginal or fack ?are these oem ?please help methank you