HI, [PLS Rate if HELPS]
The 100Base-SX standard supports the use of the same 850-nm vertical-cavity surface-emitting lasers (VCSELs) used in 10-Mbit/sec Ethernet environments, while 100Base-FX calls for 1310-nm devices.
The primary difference between 100Base-SX and 100Base-FX is in the wavelength of the light-emitting diode (LED). While 100Base-FX was written around a 1,300-nm LED to maximize transmission distance, 100Base-SX is written around an 850-nm LED. The benefit is twofold: An 850-nm LED is compatible with 10Base-FL, and it is a lower-cost device than a 1,300-nm LED.
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Best Regards,
Guru Prasad R
