EXFO America Inc. IQS-8140-DPSK 40/43 Gb/s SONET/SDH test module Optical Interface: - 1528.77 nm to 1563.86 nm, DPSK Optical Rates (ENABLED Default rates) : OC-768/STM-256 (40Gb/s) OTU3 (43Gb/s) Note: Rates enabled by default in this model are listed explicitly in the description