ELECTRONIC COMMUNICATION SWITCHING SYSTEM

ELECTRONIC COMMUNICATION SWITCHING SYSTEM

A stored program controlled electronic communication switching system provided with central control units having access to a memory consisting of high speed memory devices and low speed memory devices, such as magnetic drums. The low speed devices co-operate with said high speed devices so that data...

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Hauptverfasser: NAKAJO, TOSHIHIKO, ARAKI, NOBORU, YAMAMOTO, KOICHI, MUROGA, KO, AKIMARU, HARUO, SHIRASU, HIROTOSHI
Format: Patent
Sprache:eng
Schlagworte:
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
SELECTING
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
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creator NAKAJO, TOSHIHIKO
ARAKI, NOBORU
YAMAMOTO, KOICHI
MUROGA, KO
AKIMARU, HARUO
SHIRASU, HIROTOSHI
description A stored program controlled electronic communication switching system provided with central control units having access to a memory consisting of high speed memory devices and low speed memory devices, such as magnetic drums. The low speed devices co-operate with said high speed devices so that data can be transferred therebetween to reduce the cost ratio of the memory necessary to meet the service specification of the system. The system further comprises means for minimizing the access time to the low speed memory devices. The central control units and the low speed memory devices are of duplicated construction in order to provide high reliability. Furthermore facilities are provided to enable the system to operate in a fallback mode, should faults occur, by changing the allocation of the content of memories to thereby modify the processing mode of the system without altering the processing program itself.
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subjects ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
SELECTING
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
title ELECTRONIC COMMUNICATION SWITCHING SYSTEM
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