Easily add more channels to existing fiber infrastructure with bi-directional, passive CMX-CWDM coarse wavelength division multiplexers and demultiplexers. The Camplex Mux/Demux series avoids the expense of additional fiber cables and installation costs while increasing bandwidth by sending 3 to 18 signals over a single fiber optic cable. The mux combines signals to transmit over the fiber cable and the demux separates the signals at the receiver end. Models are available with 3, 4, 5, 8, 9, or 18 channels and in various wavelengths. Individual pigtails are labeled with corresponding wavelengths.