Request InfoEXFO Inc.QUEBEC CITY, Jan. 23, 2013 — Exfo Inc. has unveiled the WDM Investigator, which enables network operators to decrease troubleshooting time and operational expenses by providing unique identification of dense wavelength division multiplexing (DWDM) network impairments. Offered as an option on the FTB-5240S/BP optical spectrum analyzers, it provides users with better assessment of impairments affecting DWDM networks on a per-channel basis for rapid identification of the defective component. 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