The University of Arizona

Digital Telephone Service (ISDN)


Digital Telephone Service (ISDN - Integrated Services Digital Network) provides a variety of circuit-switched and packet-switched features to our customers. ISDN-compatible telephone sets can access these advanced features through a single modular connector at the customer premises. ISDN is primarily used for video and 64k modem applications. Customers provide the equipment, and our department provides the ISDN line to the jack.