A high performance communications cable with core support-separators having various shaped profiles defining and maintaining a space between transmission multi-media or transmission multi-media pairs. The core may be of a conductive or insulative material. The central core region includes a hollow opening or duct for blown fiber (ABF). The core support-separator can be interior to the cable jacket or without the benefit of a jacket. A thin layer of material can act as a type of skin for future mechanical protection. The specially shaped core support-separator has a central region that is either solid, partially solid, foamed, with a solid skin over the foam or hollow itself. The cable may include a plurality of shaped sections that extend outward from the central region along the length of the central region. Each of the defined clearance channels allow for disposal therein of conductors and optical fibers.