Bell Telephone Magazine, Vol. 47

Bell Telephone Magazine, Vol. 47 : January/February 1968 (Classic Reprint)

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Excerpt from Bell Telephone Magazine, Vol. 47: January/February 1968 Unlike other machines, the switched network must grow and change while it is operating. It can never be shut down while improvements are made. Thus, any changes in the nation's communications network must be evolutionary. The wholesale scrapping of working equipment in which billions have been in vested and replacing it with new would be as unthink able from the financial point of view as it would be disastrous in terms of service disruption. And, as the system evolves, all additions must be compatible with existing equipment. Innovations must also be proved out in terms of their practical value and they must meet rigid reliability and cost standards to meet the overall Bell System objectives. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
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Product details

  • Paperback | 460 pages
  • 152 x 229 x 24mm | 608g
  • English
  • 309 Illustrations; Illustrations, black and white
  • 0243207972
  • 9780243207978