GLENAYRE

computer programs for use in the field of communications; DC-DC converters; power supplies; message administration systems comprising a telephone exchange terminal, a printer, a port concentrator, and a number of computer screens and keyboards; controllers for communications systems; radio transmitters; radio receivers; radio transceivers; radio repeaters; radio tone encoders and decoders; telephone and radio modems; paging terminals; voice message terminals; radiotelephone base station terminals; radiotelephone exchange terminals; radiotelephone subscriber terminals; radiotelephone control heads; RF power amplifiers and exciters; universal paging decoders