COM 21

COM 21

interface units to permit the connection of multiple voice, data and datatex carriers to in-house telephone wiring circuits; units for multiplexing and packetizing, and for demultiplexing and depacketizing voice, data and datatex signals; units for transmitting voice, data and datatex signals upstream and down stream as an integral part of cable TV systems using wire, fiber optic and wireless links; and units for interconnection of multiple cable TV, telephone and data transmission systems for transmitting voice, data and datatex signals therebetween in all directions using wire, fiber optic and wireless links therebetween; and parts for each of the above;cable television transmission services and data, datatex and voice telecommunicaton services;