The Defense Information System Network (DISN) provides a variety of voice, video and data transport services for classified and unclassified users in the continental United States (CONUS) and overseas (OCONUS). DISN supports customer requirements from 2.4 kbps to 155 Mbps (OCONUS) and 2.5 Gbps (CONUS). Its best-value network solutions include inherent joint interoperability, assured security, redundancy, high reliability/availability, 24/7 in-band and out-of-band network management, engineering support and customer service.

DISN transport services are available to all Department of Defense (DoD) agencies and military services, as well as other federal government agencies.

Services can be ordered through the telecommunications control officer (TCO), who will validate requirements and verify funding authorization.