1. A bi-directional MMDS/MDS over-the-air communications system for receiving MMDS programming and for transmitting MDS data, said system comprising: an antenna, said antenna receiving said MMDS programming and transmitting said MDS data, a bi-directional converter connected to said antenna for down converting said received MMDS programming from said antenna into a group of converted MMDS signals in a first predetermined frequency range, a receiver, a communications link connected to said receiver and to said bi-directional converter for delivering said group of converted MMDS signals over said communications link to said receiver, means connected over said communications link to said bi-directional converter for generating data in a second predetermined frequency range, said communications link simultaneously delivering said group of converted MMDS signals and said generated data, said bi-directional converter responsive to said generated data in said second predetermined frequency range over said communications link for up converting said generated data in said second predetermined frequency range from said generating means into said MDS data, said antenna responsive to said MDS data from said bi-directional converter for transmitting said MDS data, said bi-directional converter down-converting said received MMDS programming simultaneously with up-converting said generated data.