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IBM Journal of Research and Development  
Volume 13, Number 4, Page 416 (1969)
Operations Research / IBM 2750
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Electronic Switching Network of the IBM 2750

by R. E. Reynier
A description of the voice and data switching network of a fully electronic private automatic branch exchange (PABX) is given, including a description of the crosspoint device and its principles of operation. Some related circuity is described, including the terminal and service circuits, supervision circuits and a loss-compensation device.
Related Subjects: Circuit and device technology; Communications and communication networks; IBM 2750