https://tube.test.blacklodge.link/videos/watch/eab095f8-4831-4e32-8d9a-fef05b35cad6 Turns out... ISDN is hard. Special thanks to Matt N for the Adtran Atlas 550 and @CathodeRayDude for publishing a guide on it! Want more content like this? Support our mission! Send us a Super Thanks and check out our Patreon + Discord community: https://www.patreon.com/serialport Got some retro gear you want to donate? Get in touch with us at serialport.org. Our second channel: @TheParallelPort #internet #telephony #dialup 00:00 — Going all in on ISDN 00:41 — Integrated Services Digital Network 02:13 — ISDN infrastructure 04:15 — Adtran Atlas 550 06:55 — Terminal Adapters! 11:40 — Trying again 16:05 — Just getting started... References: https://docs.google.com/document/d/e/2PACX-1vTA3PKLM0MngS9wU0m3oMnRfH7tYfCzgK5zagoT-91iTbXsQuAedhcWy1xqwsoiDZ15qbVMxJ260TRj/pub Mon, 20 Jul 2026 03:38:12 GMT https://validator.w3.org/feed/docs/rss2.html PeerTube - https://tube.test.blacklodge.link https://tube.test.blacklodge.link/client/assets/images/icons/icon-1500x1500.png https://tube.test.blacklodge.link/videos/watch/eab095f8-4831-4e32-8d9a-fef05b35cad6 All rights reserved, unless otherwise specified in the terms specified at https://tube.test.blacklodge.link/about and potential licenses granted by each content's rightholder.