[tardoe]

ROADMs + dynamic reconfiguration using domain controllers is the way to go - Nokia has this sort of tech and it's well in-use by large T1 networks. Routers are often pre-patched into ROADM ports and wavelengths on longer spans are add/removed as capacity is needed.

[tesdinger]

Do they have "unidirectional" transceivers to add more upload? Never heard of that just guessing.