The QAMnet DAM Dense-Wavelength Add Modules allow optimal flexibility to system designers for configuring multiple wavelengths in HFC networks. A specific wavelength can be inserted (ADD) into the incoming optical signal. These easy-to-use devices can be used to in a series, so that wavelength Adding can be done incrementally. DAM devices offer low insertion loss and high isolation in a totally passive device. It can be ordered in unpackaged device form or a connectorized module, housed inside a precision machined aluminum package.