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Automatic Digital Network
From Wikipedia, the free encyclopedia
The Automatic Digital Network (AUTODIN) is a legacy data communications service in the United States Department of Defense. AUTODIN originally consisted of numerous AUTODIN Switching Centers (ASCs) located in the United States and in countries such as England and Japan.
The design of the predecessor ComLogNet began in 1958; design of AUTODIN began in 1962 by contractor Philco-Ford and deployment started in 1966. In 1982, a follow-on project, AUTODIN II, was terminated in favor of using ARPANET technology for the Defense Data Network.
Currently, the AUTODIN Switching Centers have been replaced by various hardware/software combinations. The following are some examples:
- A program called NOVA to operate circuits and route messages. The system is designed to run at 2400 baud, however speeds up to 9600 baud is possible. Speeds above 9600 baud will generally cause system failures. The system is able to run down to 15 baud if communications systems require it.
- A series of hardware/software systems called DABS (DoDIIS Autodin Bypass System) which allows the transmission of messages over Serial connections at up to 9600 Baud as well as TCP/IP connections that allow the transmission of messages across Ethernet connects at speeds limited only by the network bandwidth.
Early in the 21st century, all but one of the AUTODIN Switching Centers had been shut down. The intention is to transition secure messaging traffic to the Defense Message System.
- Defense Switched Network
- Defense Message System
- Western Union
- Autovon contemporaneous voice network