Editing Autovon (section)

==Circuits==
AUTOVON used a combination of its own constructed circuits and other lines operated by [[AT&T Corporation]] and smaller [[independent telephone companies]], connected by high-speed switching centers produced by [[Automatic Electric Company]]<ref name="AW-19630923" /> to exchanges located far from other civilian or military targets. In the US the cables were predominantly [[L-carrier]] coaxial multiplex built by AT&T, who also used them to carry about one third of all civilian long-distance calls, as their capacity was much higher than the military needed. Although unused, some of the cables remain today and the routes are visible on satellite photos.  The system's traffic was transported over many media other than underground cable, including [[Microwave transmission|microwave link]]s, open wire and, near the end of the system's life, [[fiber optic]].  

Most of the cable was [[Direct-buried cable|directly buried]] without added concrete, relying instead on the natural protection of soil. In some areas, however, cables from the [[AUTOSEVOCOM]] network were laid in parallel. These were often [[Protective distribution system|concrete-encased]] when the traffic they were carrying was not [[encrypted]].

The [[Telephone exchange|telephone switches]] used were initially a [[Four wire circuit|4 wire]] version of [[Number Five Crossbar Switching System]], replaced in the early 1970s after the more versatile [[1ESS switch]] had shown its reliability.

Most of the cable repeater huts have been sold to private interests, to round out existing parcels, or as possible build-to-suit tower sites, etc.  AT&T has been filling the small underground portion before sale, unless they sell to a major company.  The junctions for AUTOVON are also being sold into private ownership, with a few exceptions.  Most are stripped of all the equipment, although the AUTOVON junction in [[Mounds, Oklahoma]] was sold with all the old equipment in place.{{Update inline|inaccurate=yes|date=December 2011}}