There are two types of WDM architecture: Coarse Wave Division Multiplexing (CWDM) and Dense Wave Division Multiplexing (DWDM). CWDM systems typically provide 8 wavelengths, separated by 20nm, from 1470nm to 1630nm. Some DWDM systems provide up to 144 wavelengths, typically with no more than 2nm spacing, roughly over the same range of wavelengths.
With PacketLight's WDM equipment, a customer can start with 8 CWDM wavelengths but then grow by introducing DWDM wavelengths into the mix, utilizing the existing fibre and maximizing return on investment.
