19CH O+C-Band DWDM Module 1. Product Description The 19CH O+C-Band DWDM Module is a passive wavelength-division multiplexing component designed to combine O-band and C-band wavelength channels within a single optical module. 2. Key Features Test Report Product Name: 19CH O+C-Band DWDM Module (Mux&Demux) B OP Optical Performance Unit Test Data Mux Demux 1 CH Channels 19 2 CW Center Wavelength ( nm) O-Band:O284/O286/O288/O290/O292/O294/O296/O298C-Band:C20/C21/C22/C23/C24/C25