Description The Cisco C57 DWDM-SFP10G-31.90 compatible 10GBASE-DW40 module provides robust 10Gb/s performance over a 40km span using single-mode fiber (SMF). Operating on ITU channel 57 (1531.9nm) with a duplex LC connector, it offers an efficient, fiber-saving solution for long-reach Cisco networking. This module ensures stable signal integrity for high-bandwidth wavelength-multiplexed links.
