Harmonic answers the demand for advanced television features. The company provides fiber-optic and wireless network transmission products used to enable video-on-demand services. Its video transmission equipment includes digital headend systems, digital signal encoders, and complete provider-to-subscriber delivery systems. Harmonic also supplies multiplexers, optical nodes, transmitters, optical amplifiers, and other broadband network access equipment. The company sells directly and through distributors and systems integrators, primarily to cable and satellite TV providers. Its customers include Cablevision, Charter Communications, Comcast, and Time Warner Cable.