Communication Service for the United States Department of Defense
The
Defense Switched Network
(
DSN
) is a primary information transfer
network
for the
Defense Information Systems Network
(DISN) of the
United States Department of Defense
. The DSN provides the worldwide non-secure voice,
secure voice
, data,
facsimile
, and
video teleconferencing
services for
DOD
Command and Control
(C2) elements, their supporting activities engaged in
logistics
,
personnel
,
engineering
, and
intelligence
, as well as other
Federal
agencies.
In 1982, the DSN was designated by the
Office of the Secretary of Defense
(OSD) and the
Joint Chiefs of Staff
(JCS) as the provider of long-distance communications service for the DOD. The DSN is designated as a primary system of communication during peacetime, periods of crisis, preattack, non-nuclear, and post-attack phases of war. The network assures nonblocking service for users with "flash" and "flash override"
precedence capabilities
. Key users include the
National Command Authorities
,
Commanders of the Combatant Commands
, and subordinate component commanders. DSN replaced the older
Autovon
system.
The DSN consists of four subsystems:
The DSN Switching Subsystem consists of multifunction,
stand-alone tandem
,
end office
, and remote switching units. Using the transmission, timing, and control elements of the DISN, they interconnect all military locations worldwide and provide end-to-end long-distance common user and dedicated voice, secure voice, data, and video services worldwide.
In addition to nonsecure voice, data, and video services, the DSN will provide transmission, switching, and support services for Secure Telephone Units, Third Generation (
STU-IIIs
, now obsolete), the
Secure Terminal Equipment
(STE), the
Defense Red Switch Network
(DRSN), the dial-up alternative routing for the Unclassified but Sensitive
Internet Protocol
(IP) Router Network (
NIPRNet
), and the Secret IP Router Network (
SIPRNet
). The DSN can also provide access to the
Government Emergency Telephone System
(GETS).
Area codes
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Eight
area codes
are used to cover certain geographical areas for regular voice communications:
[1]
Other area codes are assigned to functional areas:
- 20x for interface with the
United Kingdom
's Defence Fixed Telecommunications Service (DFTS)
- 606 for interface with
NATO
's Core Network (NCN)
- 7xx for interface with
Australia
's Defence Voice Network (DVN)
- 715 for interface with
New Zealand
's Defence Telephone Network (DTelN)
References
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External links
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]