my question is what happen if i use this gbic with single mode wire under 500m between my sge2000p switch.
If you already purchased MGBLH1 SFP 9/125um SMF, up to 40km then
1.Either check optical power and if it is less than -3dBm then use it (Like -4dBm)
2. If it is more than -3dBm (-2, -1 etc )then use an 5dBm optical attenuator
3.If not bought can go for single mode 10Km or 2 Km multimode (MGBLX1 1000BASE-LX SFP transceiver, for single-mode fiber, 1310 nm wavelength, support up to 10 km, MFEFX1 100BASE-FX SFP transceiver, for multimode fiber, 1310 nm wavelength, support up to 2 km)
Depending on your current and future requirement
