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Recent innovations in DWDM transport systems include pluggable and software-tunable transceiver modules capable of operating on 40 or 80 channels. This dramatically reduces the need for discrete spare pluggable modules, when a handful of pluggable devices can handle the full range of wavelengths.

Passive CWDM is an implementation of CWDM that uses no electrical power. Its ability to work is based on the principals of a prism. Many manufactures are promoting passive CWDM to deploy fiber to the home. Used with CWDM SFP transceiver, CWDM XFP transceiver, CWDM X2 transceiver, CWDM SFP+ transceiver

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