These pictures are from the book "Long Lines, The Bell System Unit for Nationwide and Worldwide Communications", July 1969, a AT&T publication.

From the preface:

"This book tells about the Bell System's service responsibilties and how it fulfills them.

"The emphasis here is on Long Lines. But the rest of the Bell System is described in some detail so the reader can get an idea of how the different parts fit together to furnish nationwide and worldwide communication service.

"The book is intended primarily to help new employees acquire a fuller understanding of the organization they have joined. It is also meant as a reference for those who want to refresh their memory on various aspects of the telephone business."

Click on photo for a larger (very much larger) scan.

Inside of Andover Maine Telstar dome

Outside of dome for reference. This picture is taken from a
postcard.

Cross section of L-4 cable with
20 tubes, capable of handling
32,400 simultaneous telephone
conversations.

Installation of nation's first underground telephone cable between
Washington and Boston, winter 1910.

Turquoise, California MW station, circa 1969.

Questions/Comments to Daryl Gibson