System for tranferring data from one communication line to anoth

Details System for tranferring data from one communication line to anoth System for tranferring data from one communication line to anoth

1993-08-17

1996-06-25

Lee, Thomas C.

Static information storage and retrieval

Magnetic bubbles

Guide structure

395873, 395445, 36518905, 3649521, 364959, G06F 1300, G06F 1320

Patent

active

055309046

ABSTRACT:
A store and forward switching system, typically for use as a facsimile system, has a plurality of communication control units for controlling transmission and reception of data through a plurality of respective communication lines, a multiplexer for transferring data to and from a selected one of the communication control units, a hard disk for storing data, a bulk processor for reading data from the hard disk and writing data in the hard disk, a main processor for controlling the multiplexer, the hard disk, and the bulk processor, and a system bus connected to the multiplexer, the bulk processor, and the main processor. The multiplexer and the bulk processor have first and second data transfer execution units, respectively, for transferring data between the multiplexer and the bulk processor through the data transfer bus without being handled by the main processor. Since data are transferred directly between the multiplexer and the bulk processor, the main processor is freed from a burden which would otherwise be imposed by the transfer of data therethrough, and the data transfer can be effected efficiently. A data transfer bus may be connected to the multiplexer and the bulk processor for transferring data therethrough while allowing the main processor to send and receive various request and response signals through the system bus.

REFERENCES:
patent: 4133028 (1979-01-01), Bernstein
patent: 4491909 (1985-01-01), Shimizu
patent: 4688168 (1987-08-01), Gudaitis et al.
patent: 5276799 (1994-01-01), Rivshin
patent: 5303354 (1994-04-01), Higuchi et al.

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