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Defense Information Systems Network (DISN)

A sub-element of the Defense Information Infrastructure (DII), the Defense Information Systems Network (DISN) is the Department of Defense’s (DoD) consolidated worldwide, enterprise-level telecommunications infrastructure that provides the end-to-end information transfer network for supporting military operations. The DISN, transparent to users, facilitates the management of information resources and is responsive to national security and defense needs under all conditions in the most efficient manner. The DISN is an information transfer network with value-added services for supporting national defense Command, Control, Communication, and Intelligence (C3I) decision support requirements D Glossary TOC 75 and Classified Military Information (CMI) functional business areas. As an information transfer utility, the DISN provides dedicated point-to-point, switched voice and data, imagery and video teleconferencing communications services.