SAN MATEO, Calif. — Cisco Systems Inc. last week introduced a 32-wavelength dense wave-division multiplexing (DWDM) system for the metropolitan network, targeting both enterprise and service-provider ...

With long-haul optical networking in a parlous state, Cisco is launching products for the parts of the market where it sees the strongest future: a multi-service SDH platform and a Metro DWDM switch ...

I've been asked to help connect 2 sites via single mode, and were told that we have to use dwdm and were allocated a specific channel. I've only ever used the "normal" single- or multi-mode ...