Extracts - TCI Library

BTL 1975 - Switching Technology Chronology 1925-1975 - extract

paul-f@verizon.net (Paul F) — Fri, 28 Aug 2026 10:25:38 -0700

12 pages. Extracted from: A History of Engineering and Science in the Bell System, Switching Technology (1925-1975), pages 605-616 by Paul Fassbender.

BTL 1978 - Switching Systems for FAA - Sys 300 301 301A - extract

paul-f@verizon.net (Paul F) — Sat, 02 Feb 2019 22:13:05 -0800

From A History of Engineering and Science in the Bell System - National Service in War and Peace (1925-1975) - 1978
2.3 FAA Air-Route Traffic Control System
2.3.1 No. 300 Switching System

BTL History: The Early Years (1875-1925) - 1975 - ToC, References, Credits and Index - extract

paul-f@verizon.net (Paul F) — Fri, 25 Apr 2014 14:47:21 -0700

From A History Of Engineering and Science In The Bell System - The Early Years (1875-1925). 71 page extract includes Table of Contents, References (27 pages), Credits and Index (28 pages). Bookmarked. Contributed by Steph Kerman.

BTL 1975 - Switching: Step-by-Step Improvements - extract

paul-f@verizon.net (Paul F) — Wed, 28 Oct 2009 06:58:25 -0700

From A History of Engineering and Science in the Bell System: Switching Technology. 16-page extract titled Step by Step Improvements (pages 22-37).
WE installed AE switches until production started in 1926. SxS.