Since 1989, American Telephone Service, Inc. has been meeting the telecommunication needs of businesses across South Louisiana, South Mississippi and Southeast Texas. Specializing in the design, installation and maintenance of phone systems and voicemail, data networks and surveillance cameras. We provide exceptional service and products from trusted manufacturers like Avaya, Nortel, Panasonic, Plantronics, Valcom, Corning, Lucent, Tripplite and Vitek. Family owned and operated, ATSI serves businesses and institutions of all sizes and across all industries providing the utmost in customer service and reliability.