Apparatus for CCIS data transfer between a CPU and a plurality o

Details Apparatus for CCIS data transfer between a CPU and a plurality o Apparatus for CCIS data transfer between a CPU and a plurality o

1982-08-30

1984-08-14

Zache, Raulfe B.

Boots, shoes, and leggings

179 18ES, G06F 300

Patent

active

044660626

ABSTRACT:
A single CCIS central processing unit is employed to receive and transmit CCIS data from a central switching office to other CCIS offices via modems, or digital trunk units and T1 spans. This apparatus facilitates orderly and timely data exchange between a CCIS central processing unit and a plurality of data terminal equipment. Every 10 milliseconds the CCIS CPU scans all the data terminal equipment. However, particular data transmissions require interaction at a more rapid rate. The present invention provides for a high priority data transmission from the terminal equipment to the central processing unit intermingled with regular priority messages.

REFERENCES:
patent: 4166929 (1979-09-01), Sheinbein
patent: 4249239 (1981-02-01), Mescam et al.

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