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Autodialer Adapter with Fault Location

IP.com Disclosure Number: IPCOM000090723D
Original Publication Date: 1969-Jun-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Manolick, AW: AUTHOR [+2]

Abstract

This interface adapter allows a central processor CPU to control an autodialer and it is specially arranged to aid in fault location within the adapter and the CPU. Six bits, representing a Call Request CRQ and Digit Present DPR, and four address or data bits are normally passed through the adapter to the autodialer. Three bits, representing Power On Indicator PWI, Abandon Call Retry ACR, and Present Next Digit PND, are passed back from the autodialer through the adapter to the CPU. The signals from the CPU are stored in a buffer whose output is returned to the CPU as an echo. That is, if DPR is set, the four data bits echo back, but if the DPR bit is not set, the CRQ is echoed back on one of the data bit positions.

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Autodialer Adapter with Fault Location

This interface adapter allows a central processor CPU to control an autodialer and it is specially arranged to aid in fault location within the adapter and the CPU. Six bits, representing a Call Request CRQ and Digit Present DPR, and four address or data bits are normally passed through the adapter to the autodialer. Three bits, representing Power On Indicator PWI, Abandon Call Retry ACR, and Present Next Digit PND, are passed back from the autodialer through the adapter to the CPU. The signals from the CPU are stored in a buffer whose output is returned to the CPU as an echo. That is, if DPR is set, the four data bits echo back, but if the DPR bit is not set, the CRQ is echoed back on one of the data bit positions.

As an additional aid in testing for malfunctions, the CPU can also transmit two diagnostic bits to the adapter to simulate the signals from the autodialer. If any diagnostic bit is present, the PWI signal is returned to the CPU and, if both are present, the ACR bit is also returned to the CPU. In one of the two other bit combinations 01 or 10, a PND bit signal is returned along with the PWI bit signal.

With these echo and simulation circuits, the diagnostic program of the CPU can run a full check of the majority of the adapter circuits to localize malfunctions and thus assist trouble shooting.

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