Prisma multiplexer and demultiplexer (mux/demux) components are essential elements for implementing DWDM to increase network efficiency by significantly reducing fiber counts. Most units are available in the industry recognized, LGX-compatible form factor to allow easy, snap-in mounting in a variety of enclosures and cabinets. The LGX modules can be used in the same chassis as coupler/splitters and patching modules to achieve high-density rack configurations. The Prisma mux/demux components are also optimized to achieve low insertion loss at all wavelengths. The 40-channel wavelength parts are packaged in standard 1 or 2 RU enclosures that mount in any standard 19-inch equipment rack. A single-channel optical add-drop multiplexer (OADM) is also available in a raw filter package for outside plant applications.