1. Product Title 19CH O+C-Band DWDM Mux/Demux – 8CH O-Band + 11CH C-Band 2. Product Overview GracyFiber 19CH O+C-Band DWDM Module is a dual-band wavelength multiplexing solution combining 8 O-band channels and 11 C-band channels within one passive optical module. The device operates across 1260–1360 nm and 1525–1575 nm , enabling O-band and C-band optical signals to be multiplexed or demultiplexed through a common COM interface. 3. Key Features 19-channel O+C-band DWDM