TELEBYTE

Short haul modems, short range modems and limited distance modems for use with twisted pair cable and fiber optic cable; data communications test equipment used to test global computer information network access and to simulate telephone network noise and interference; high digital subscriber line modems; asymmetrical digital subscriber line modems; integrated services digital network modems; multiplexers used for the sharing of a common transmission medium, comprising either copper cable or fiber optic cable by a multiplicity of terminals