1. Product Introduction The 19CH O+C-Band DWDM Module is a multi-channel Dense Wavelength Division Multiplexing (DWDM) module that covers both the O-band and C-band, enabling the multiplexing and demultiplexing of optical signals across these two bands within a single device. 2. Product Features Test Report Product Name: 19CH O+C-Band DWDM Module (Mux&Demux) Part Number: 20020121040106 Serial Number: 20260921003 B OP Optical Performance Unit Test Data Mux Demux 1 CH Channels