Signaling data receiving and processing unit provided in a broad

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

1991-07-17

1994-11-29

Atkinson, Charles E.

Excavating

371 401, G06F 1110

Patent

active

053696492

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. The exchange is connected with terminal equipment arranged in a narrow band ISDN environment in a broadband ISDN system. The error check is performed by calculating an error check code for every byte of the signaling data as it is received, accumulating the result until the cyclic redundancy code, encountered in the last byte of the signaling data, is accumulated and performing matching between the accumulated result and a constant value produced based on the CRC system. The checking is performed while the signaling data is stored in a data memory in the signaling data receiving and processing unit. The data memory provided in the signaling data receiving and processing unit has memory regions capable of storing the signaling data sent from the terminal which is allocated as needed by a central controller of the digital exchange.

REFERENCES:
patent: 4953164 (1990-08-01), Asakura et al.
patent: 5130991 (1992-07-01), Takano
patent: 5146461 (1992-09-01), Duschatko et al.

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