If there are not many fiber-optic cables to the node, wavelength division multiplexing can be used to combine multiple optical signals onto the same fiber. For example, the downstream signal could be on a. Hybrid Fiber-Coax (HFC) is a telecommunications network architecture that combines two different types of transmission mediums, namely optical fiber and coaxial cable, to provide high-speed data, video, and voice services to homes and businesses. This enables network subscribers to enjoy applications like digital TV, video on demand and telephony. The Race with Fiber – Getting the Most out of the Hybrid.