Contributed by Sam Etler.

Acoustic and Inductive Coupling for Data and Voice Transmission. October 1972.  Shows G- and Trimline handset dimensions.  F-58654 Coupler Test Set.  Contributed by Clint Gilliland. 

Contributed by Steve Cichorsky. OCR by Remco Enthoven. Processed by Paul Fassbender.

24 pages. "This public telephone instruction card manual introduces the first universally applicable standard for language, graphics, and overall card design." OCR and bookmarks by Paul Fassbender.

This links to a Library page containing a complete text searchable index that provides access to the full run of BSTJ articles from 1922-1983.  It can be accessed more easily from "Browse the Library" on the black menu bar above.

Contributed by Sam Etler with TCI formatting and site integration by Paul Fassbender.

40 pages. March 1978 with product name updates from 78, 80, 82 and 83. OCR and Bookmarks by Paul Fassbender.

Scanned and processed by Remco Enthoven | Contributed by Fred Haynes

Blast Detector Function Description
For Underground L-3 Coaxial Cable Buildings
American Telephone & Telegraph
Long Lines Division
August 1966
Paris RS, Missouri

Bell System Technical Reference.  Data Communications using voiceband private line channels. Info for designers and manufacturers of data terminal equipment and voiceband private line channels offered under interstate Tariff F.C.C. No. 260 and similar intrastate tariffs. Contributed by John Gilbert.

11MB. 365 pages. Preface by C. L. Lovell, Bell Labs, PRIVATE EDITION, Morris, IL Electronic Central Office, Trial Installation. Contributed by Astrid Smith, Connections Museum. Missing page supplied by Steph Kerman and integrated by Karl Brose.

Contributed by Steve Cichorsky. 

Contributed by John Novack.

EDUCATIONAL BULLETIN NO. 2.50
FUNDAMENTALS OF EQUIPMENT ENGINEERING - "This bulletin ls issued to describe the fundamental routines and practices employed by the Equipment Engineer. Informat1on contained herein is to be used for training purposes only."

Includes an exhaustive description of "Information and References Used by Equipment Engineers," such as drawing types, keysheets, standard specifications (J-, K-, KS-, and C-), reference books, etc. For example:

KS SPECIFICATION - Specifications issued by the Bell Telephone Laboratories covering engineering requirements manufactured by outside suppliers.

Specifications in the KS-5000 series are issued to cover engineering requirements which must be met by outside suppliers in connection with equipment wh1ch they furnish to the Western Electric Company. These specifications are used by the Merchandise and Manufacturing Departments for ordering, analyzing and editing purposes and by the Inspection Department for checking Purposes.