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Indialing to PBX extensions: Application in a step-by-step central office area

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1 Author(s)
Schleinkofer, G. Norman ; Bell Telephone Company of Pennsylvania, Philadelphia, Pa.

Up to the present time, the completion of an incoming call to a private branch exchange (PBX) extension telephone has been dependent upon a human attendant. She must determine what extension station is desired and do the proper switching of the call from the incoming trunk to the station. Indialing provides a means whereby the call is dialed directly from the general exchange system to the PBX station without the need for a human attendant, except for transfer and information services.

Published in:

American Institute of Electrical Engineers, Part I: Communication and Electronics, Transactions of the  (Volume:78 ,  Issue: 5 )