The EMCORE Optiva MDM-7001D DWDM MUX/DEMUX supports as many as 16 DWDM wavelengths for applications from 1547 nm – 1559 nm. The MDM-7001D-4 is a one-slot Optiva plug-in module, while the MDM- 7001D-8 and MDM-7001D-16 are two-slot Optiva plug-in modules. The MDM-7001D DWDM MUX/DEMUX is most typically used when either leased fiber cost is an issue or when the existing fiber plant has reached its maximum capacity.