Circuit for ccis data transfer between a cpu and a plurality...

Details Circuit for ccis data transfer between a cpu and a plurality... Circuit for ccis data transfer between a cpu and a plurality...

G - Physics

06

F

354/233

G06F 9/00 (2006.01) G06F 11/20 (2006.01) H04Q 3/545 (2006.01)

Patent

CA 1269171

CIRCUIT FOR CCIS DATA TRANSFER BETWEEN A CPU AND A PLURALITY OF TERMINAL EQUIPMENT CONTROLLERS ABSTRACT OF THE INVENTION Simplified CCIS (Common Channel Interoffice Signalling) data transfer circuitry is shown for transmitting data between a CCIS central processing unit of a central switching office and a number of terminal equipment controllers, each having a local CPU. The terminal equipment controller operates such equipment as modems of various speed, digital trunks or T1 spans. This design minimizes the amount of circuitry required to transmit CCIS data between central processing units, thereby permitting a more reliable design. This circuit provides a minimal amount of logic required for interprocessor communication. In addition, this circuit minimizes the amount of real time required by each CPU to perform the CCIS data transfer.

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