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Autovon Dial-Through

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  • OZOB99
    Autovon precedence and dual homing for priority subscribers has been discussed previously, here is a snippet on this feature that may be new to most members;
    Message 1 of 1 , May 16, 2013
      Autovon precedence and dual homing for priority subscribers has been discussed previously, here is a snippet on this feature that may be new to most members; I've only found this one reference to it online, although I recall the term from years ago but had no details on it; the scheme is somewhat analogous to the ATOC's(see archive) and the Project Offices' PSN access trunks to Charlotte, Richmond, Pittsburgh & Charleston; for emergency use if the PSN is impaired for various reasons.




      "The dial-through procedure was to dial the Autovon dial-through
      number for one of the nine switches. This would result in a normal
      connection with normal routing between the subscriber location and the
      Autovon switch. The dial-through number would then provide a dial tone
      allowing a second number to be dialed as if the caller were a subscriber to
      that switch. The second number could either be another dial-through number
      or a second subscriber. Thus, as many of the nine switches as desired could
      be "dialed through" on the way to reaching the second subscriber. The
      dial-through calls were intended to force alternate routings which might
      exist in an emergency condition. It should be emphasized, however, that the
      routings involved in dial-through calls guarantee only that the call goes
      through the dial-through switch and does not guarantee anything about the
      routings to and from that switch. Thus, a "single" dial-through call from
      Melbourne to the Pentagon via the Jasper switch has no guarantee of going
      through exactly three Autovon switches. (Polk City for Melbourne; Jasper and
      Arlington for the Pentagon.) Additional switches may be picked up on either
      or both legs if the direct trunks from Polk City to Jasper or Jasper to
      Arlington are busy. A dial-through from Melbourne to the Pentagon via the
      Norway switch is guaranteed to involve at least four switches since there are no direct trunks from Polk City to Norway.


      The dial-through calls utilized special dial-through numbers that
      were assigned to nine Autovon switches. These switches were:


      1) Yakima, Washington
      2) Seguin, Texas
      3) San Luis Obispo, California
      4) Pottstown, Pennsylvania
      5) Norway, Illinois
      6) Drainsvllle, Virginia
      7) Arlington, Virginia
      8) Moseley, Virginia
      9) Jasper, Alab"

      (from http://www.dtic.mil/cgi-bin/GetTRDoc?AD=ADB053656 p8-9)

      ---------------------------------------------------------------------------------------------------------------------------------

      Why these 9?; my offhand guess is, other than serving the geographic area:

      SLO was a gateway to Pacific Command switches and a GEP for ABNCP's.

      Pottstown was a gate way to European Command switches.

      Jasper was a GEP for ABNCP's.

      Moseley was the largest switch for a time, and served the Southern Command.

      Dranesville was the Network Management Center and, with Arlington, dual homing switches for VIP's.

      Yakima was a gateway for Alaska Command.
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