To be more specific, you cannot mix them because the optics operate at different wavelengths. SX GBICs operate at 850-nanometer, and LX/LH GBICs operate at 1300-nanometer. They won't "see" each other.
Also, I think there's a subtle difference in the way the GBICs put the light into the fiber: SX GBICs put it out off-set from the center of the fiber strand, in a way that generates multiple modes ("multimode"); LX/LH GBICs put it out down the center, so that there's a "single mode". When LX/LH GBICs are used with multimode fiber, they generally need a mode conditioning launch cable, that takes the single mode output of the LX/LH GBIC and steps it into the multimode fiber in such a way as to avoid flaws in the center of the multimode fiber strand, essentially "multimoding" it. Because the optical power is stronger, and because of the characteristics of the 1300-nm light, it lets you go farther on multimode fiber (550m) than the SX GBICs (220-275m).
This is actually a pretty cool feature, i didn't even know it existed until I was looking for a solution to advertise a subnet (prefix in BGP talk), only if a certain condition existed. This is exactly what conditional advertisements does
j ai une question j ai achete un routeur cisco 887VA-k9 , je le configuré avec la configuration ci- dessous
si je le lier avec mon pc portable sur l un de ses ports directement ça marche toute est bien ( la connexion internet + m...
Attached policy provides CLI access to the Cisco 4G router over text messaging. Two files are in the attached .tar file:
2. PDF with instructions on how to load and use the .tcl file.