Signaling data receiving and processing unit provided in a...

Details Signaling data receiving and processing unit provided in a... Signaling data receiving and processing unit provided in a...

H - Electricity

04

Q

H04Q 1/20 (2006.01) H04L 12/52 (2006.01) H04Q 11/04 (2006.01) H04L 12/56 (2006.01)

Patent

CA 2047120

ABSTRACT An error check of a signaling data divided into divided signaling data transferred asynchronously in a unit of cells is performed in a signaling data receiving and processing unit in a digital exchange, which is connected with terminal equipments arranged in a narrow band ISDN, in a broadband ISDN by calculating an error check code every byte of the signaling data, accumulating the calculating result until the CRC code at the last byte of the signaling data is accumulated and taking matching between the accumulated result and a constant value obtained from the feature of the CRC system, during the signaling data are stored in a data memory in the signaling data receiving and processing unit. A data memory provided in the signaling data receiving and processing unit has memory regions capable of storing signaling data sent from the terminal equipments only having VPI/VCIs allocated by a central controller of the digital exchange.

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