MFR. Name: Cisco | MFR#: DWDM-X2-56.55=
DWDM X2 1556.55 NM X2 100GHZ ITU GRID
The Cisco Dense Wavelength-Division Multiplexing (DWDM) X2 pluggable module allows enterprise companies and service providers to offer scalable and easy-to-deploy 10 Gigabit Ethernet services in their networks.
