Tele-Communication (Telecom) Terms Glossary and Dictionary
DSN: Defense Switched Network
Defense Switched Network (DSN) is a worldwide private-line telephone network. Multilevel precedence and preemption (MLPP) capabilities on the DSN are utilized by command and control users to ensure that the highest-priority calls achieve connection quickly, especially during a crisis situation. The DSN also provides global data and video services using dial-up switched 56 kbps or 64 kbps Integrated Services Digital Network (ISDN) services.