In telecommunication, a composite cable is a communications cable having both optical and metallic signal-carrying components.

Note 1: A cable having optical fiber(s) and a metallic component, e.g., a metallic twisted pair, used solely for conduction of electric power to repeaters, does qualify as a composite cable.

Note 2: A cable having optical fiber(s) , plus a metallic strength member or armor, does not qualify as a composite cable. Contrast with hybrid cable.

Source: from Federal Standard 1037C