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Section 953.200.01 Issue 1, April, 1958
Notes on distance Dialing- Section 1
Contents.
A. The national numbering Plan- B. Switching plan for Distance dialing C. Interoffice Signals D. Equipement requirements E. Transmission Considerations. F. Switching maintenance G. Bibliography. The sounds of touch tone before touch tone.
ABCDEFG Needs to be in a library or collector.
The old phone guy
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