This is due to its relatively lower costs compared to optical fiber and coaxial cable. Gbit/s over a single coaxial cable. Refer to the diagram below showing the inner and outer conductors of a coaxial cable. These facility-based LECs include cable companies offering phone service over coaxial cable. Jerrold became one of America's first providers of coaxial cable TV systems in 1948. Electrical connections using twisted pair or coaxial cable are used within a building. The upgrades made possible by the multiplexed coaxial cable were designated Caesar Phase III. DuMont's network of stations on coaxial cable stretched from Boston to St. Louis. That same year he patented, in England, the coaxial cable. Stations not yet connected to the coaxial cable received kinescope recordings via physical delivery. The use of coaxial cable for Ethernet has been deprecated by 2011. Despite being shielded, interference can occur on coaxial cable lines. However, it can also be used with coaxial cable. Attenuation in a coaxial cable is a function of the materials and the construction. In coaxial cable energy is normally transported in the fundamental TEM mode.