It's going to depend on your infrastructure. If you have a DWDM-terminated facility within range of there location, you could terminate the DWDM at your facility, then distribute the GIG E to the customer with something like a JDS UniPhase box (up to ~100 miles ... something like that).
If you have no facility in that neighborhood, then you'll have to terminate the DWDM / WDM / CWDM at the customer's location (Big Bucks!).
I'm assuming when you say "waves" your're talking about "Lamda" - wavelengths of light that represent "channels," right?
Good Luck
Scott