Defense Information System Network

The Defense Information System Network (DISN) has been the DOD’s enterprise network for providing data, video and voice services for more than 40 years.

The DISN Leading Edge Services (DISN-LES) is a high performance advanced technology "Next Generation" network providing wide area asynchronous transfer mode (ATM) connectivity to worldwide subscriber sites. The network is used by subscribers and DISA's GE-51 Program Office to test systems, equipment, network monitoring and management technologies, trouble shooting, and help desk procedures. The DISN-LES also provides advanced technologies such as quality of service protocols. Supported capabilities include video teleconferencing and other collaborative tools such as shared white boards and distributed warfighting simulations. Another focus of the network is compatibility testing among products produced on evolving standards. Some sites have been set up to pass unclassified traffic into the encrypted part of the network. The results of network, hardware and software tests and exercises are shared with equipment and software suppliers and government organizations to provide real world experience with the advanced technologies that influence network designs and system acquisition decisions throughout the industry.