https://td-2.org/ 2026-04-29T12:03:06+00:00 https://td-2.org/ https://td-2.org/_media/wiki/logo.png text/html 2026-04-14T23:46:53+00:00 J. B. Crawford (jesse@undisclosed.example.com) https://td-2.org/start?rev=1776210413 Welcome to TD-2.org, an open resource for telecommunications history. This is very much a work in progress, but my eventual hope is to welcome additional contributors and build a useful, comprehensive, and maintainable encyclopedia on the history of telecommunications in North America. See text/html 2026-04-14T17:53:59+00:00 J. B. Crawford (jesse@undisclosed.example.com) https://td-2.org/maps/start?rev=1776189239 Maps Here you will find a collection of historic maps of telephone and telecommunications lines. They are collected from various sources, many of which were already secondhand collections---so a source is noted when possible, but it's hard to be 100% certain where these all came from. The maps are presented by the year they were created and the name shown on the map, when possible. The M# is a text/html 2026-04-14T16:54:52+00:00 J. B. Crawford (jesse@undisclosed.example.com) https://td-2.org/about/contribute?rev=1776185692 Contributor's Guide The goal of TD-2 is to become an open wiki with many contributors. To avoid problems with spam and abuse, though, account registration isn't open. If you're interested in contributing, please contact info@td-2.org to request an account. text/html 2026-04-14T16:54:05+00:00 J. B. Crawford (jesse@undisclosed.example.com) https://td-2.org/about/tags?rev=1776185645 Tags underground coaxial l3i autovon improve To tag a page, add {{tags>[list of tags]}} to the page - for example, {{tags>autovon underground}} to tag a page as autovon and underground. You can then use {{topic>tagname}} to create a list of pages with the specified tag. text/html 2026-04-14T16:50:11+00:00 J. B. Crawford (jesse@undisclosed.example.com) https://td-2.org/about/todo?rev=1776185411 To Do * Better front-page map - probably needs some custom OpenLayers development to hide labels at low zoom levels or otherwise improve readability. * Modify the KML generation to improve icons. * Add tag index pages. * Write a contributor's guide. text/html 2026-04-14T16:48:53+00:00 J. B. Crawford (jesse@undisclosed.example.com) https://td-2.org/facilities/cable/holbrook?rev=1776185333 Holbrook L-3I Main Station Need to fill in this page with more info. Built 1965-1966? Builder AT&T Routes Destination Direction Carrier Flagstaff AZ West L-3I Quemado NM East L-3I License History Construction Photos [Array] underground coaxial l3i autovon improve text/html 2026-04-14T16:48:47+00:00 J. B. Crawford (jesse@undisclosed.example.com) https://td-2.org/facilities/cable/seligman_l-3i_underground?rev=1776185327 Seligman L-3I Underground Still need to fill out this page better. Built 1965-1966? Builder AT&T Routes Destination Direction Carrier Kingman AZ West L-3I Flagstaff AZ East L-3I License History Construction Photos [Array] underground coaxial l3i autovon improve text/html 2026-04-14T16:48:40+00:00 J. B. Crawford (jesse@undisclosed.example.com) https://td-2.org/facilities/cable/lamar?rev=1776185320 Lamar L-3I Main Station Lamar, CO is an underground switching main station on the L-3I hardened transcontinental cable. Lamar provided power for the L-3I cable and a span of L-1 cable to Cheyenne Mountain Complex, an AUTOVON tandem switch, and a NORTHSTAR Ground Entry Point. text/html 2026-04-14T16:48:34+00:00 J. B. Crawford (jesse@undisclosed.example.com) https://td-2.org/facilities/cable/tucumcari_l-3i?rev=1776185314 Tucumcari L-3I Underground The Tucumcari station is a power feed for the transcontinental L-3I cable. It is located some distance south of Tucumcari. Unlike most of the L-3I undergrounds in the West, it has a rather modern and relatively large surface building, suggesting that it's seen significant reuse for some type of equipment. text/html 2026-04-14T16:48:23+00:00 J. B. Crawford (jesse@undisclosed.example.com) https://td-2.org/facilities/cable/kingman_l-3i_underground?rev=1776185303 Kingman L-3I Underground Like other L-3I main stations, this is an underground, hardened station. There is no microwave tower at Kingman, and it has not received any of the additional underground buildings common at some other L-3I stations. There is just the surface entry structure (in its original white and blue paint), ventilation, and a hoistway. text/html 2026-04-14T16:48:16+00:00 J. B. Crawford (jesse@undisclosed.example.com) https://td-2.org/facilities/cable/socorro_l-3i?rev=1776185296 Socorro L-3I Underground Socorro, or Socorro #2, was a switching main station for the transcontinental L-3I station. It's a relatively large station for the system, as it housed an AUTOVON tandem and served (at least for a time) as an alternate regional NOC and synchronization clock source. text/html 2026-04-14T16:47:26+00:00 J. B. Crawford (jesse@undisclosed.example.com) https://td-2.org/autovon?rev=1776185246 AUTOVON AUTOVON, the Automatic Voice Network, was a military telephone network operated by AT&T. There's a lot more writing to do about it! Resources The Autovon Routing Guide or “Orange Book” (available from TCI Library) is a valuable resource. Besides an in-depth explanation of the unique text/html 2026-04-14T16:38:35+00:00 J. B. Crawford (jesse@undisclosed.example.com) https://td-2.org/military/start?rev=1776184715 Military Communications Systems * GWEN * AUTOVON text/html 2026-04-13T19:57:26+00:00 J. B. Crawford (jesse@undisclosed.example.com) https://td-2.org/military/gwen?rev=1776110246 GWEN GWEN, or the “Ground-Wave Emergency Network,” was a 1980s survivable radio communications system fielded by the Air Force. GWEN was never completed, and the sites that were built proved short lived. Some had a second life as Coast Guard DGPS stations, an economical reuse of the property and towers. text/html 2026-04-13T19:56:57+00:00 J. B. Crawford (jesse@undisclosed.example.com) https://td-2.org/?image=military%3Agwen%3Agwen-dgps-sites.kmz&ns=military%3Agwen&rev=1776110217&do=media <img src="https://td-2.org/lib/images/fileicons/svg/file.svg" alt="gwen-dgps-sites.kmz" loading="lazy" width="500" height="500" /> text/html 2026-04-13T19:56:40+00:00 J. B. Crawford (jesse@undisclosed.example.com) https://td-2.org/?image=military%3Agwen%3Aceubank180804-rbvbpy8uii.png&ns=military%3Agwen&rev=1776110200&do=media <img src="https://td-2.org/_media/military/gwen/ceubank180804-rbvbpy8uii.png?w=500&amp;h=500&amp;tok=334149" alt="ceubank180804-rbvbpy8uii.png" loading="lazy" width="500" height="500" /> text/html 2026-04-13T19:26:32+00:00 J. B. Crawford (jesse@undisclosed.example.com) https://td-2.org/?image=maps%3Aregional%3A1987_southern_california.jpg&ns=maps%3Aregional&rev=1776108392&do=media <img src="https://td-2.org/_media/maps/regional/1987_southern_california.jpg?w=500&amp;h=500&amp;tok=69edcd" alt="1987_southern_california.jpg" loading="lazy" width="500" height="500" /> text/html 2026-04-13T19:26:32+00:00 J. B. Crawford (jesse@undisclosed.example.com) https://td-2.org/?image=maps%3Aregional%3A1987_nothern_california.jpg&ns=maps%3Aregional&rev=1776108392&do=media <img src="https://td-2.org/_media/maps/regional/1987_nothern_california.jpg?w=500&amp;h=500&amp;tok=3f1271" alt="1987_nothern_california.jpg" loading="lazy" width="500" height="500" /> text/html 2026-04-13T19:26:32+00:00 J. B. Crawford (jesse@undisclosed.example.com) https://td-2.org/?image=maps%3Aregional%3A1976_wyoming.jpg&ns=maps%3Aregional&rev=1776108392&do=media <img src="https://td-2.org/_media/maps/regional/1976_wyoming.jpg?w=500&amp;h=500&amp;tok=d8affa" alt="1976_wyoming.jpg" loading="lazy" width="500" height="500" /> text/html 2026-04-13T19:25:01+00:00 J. B. Crawford (jesse@undisclosed.example.com) https://td-2.org/?image=maps%3Aregional%3A1900_southeast_region.jpg&ns=maps%3Aregional&rev=1776108301&do=media <img src="https://td-2.org/_media/maps/regional/1900_southeast_region.jpg?w=500&amp;h=500&amp;tok=795e22" alt="1900_southeast_region.jpg" loading="lazy" width="500" height="500" />