Microprocessor controller for simultaneously controlling a PBX a

Details Microprocessor controller for simultaneously controlling a PBX a Microprocessor controller for simultaneously controlling a PBX a

1980-10-27

1984-04-03

Brown, Thomas W.

Multiplex communications

Wide area network

Packet switching

179 18AD, 179 18ES, 370 85, H04M 1100, H04Q 354

Patent

active

044409869

ABSTRACT:
A microprocessor controller has a central processor, including a microprocessor, to centrally control a PBX and also provide general processor capability to a plurality of data terminals. Any typical centrally controlled PBX design which processes and switches telephone calls between a plurality of trunk ports and a plurality of line ports, as is known in the art, may be connected to applicant's controller with the program control for same loaded into a dedicated PBX memory of the microprocessor controller. A supervisory program controls the microprocessor's processing time by dividing it into slices which are allocated to the various data ports and the PBX portion, with provision for interrupting and aborting time slots not calling for processor time to ensure efficient and reliable operation of the PBX. Each of up to six data ports is allocated a partition of memory and access to other partitions is denied to preserve the integrity and confidentiality of data and programs stored by each data port. A command terminal connection is provided and the supervisory program allows the command terminal to access all of the processor's memory, including the partitioned data port memory and the PBX memory, so that changes and monitoring of processor use may be made by a limited group of personnel having access thereto. The command terminal also provides ready access for troubleshooting of equipment failure in any portion of the controller.

REFERENCES:
patent: B533454 (1976-03-01), Moran
patent: 3344401 (1967-09-01), MacDonald et al.
patent: 3898387 (1975-08-01), Fort
patent: 3932709 (1976-01-01), Hoff et al.
patent: 4069399 (1978-01-01), Barrett et al.
patent: 4093823 (1978-06-01), Chu
patent: 4160131 (1979-07-01), Kaul et al.
"Microprocessors in Telecommunications", Garen & LaZar, Telecommunications, Apr. 1976, pp. 43-48.
"System 2150-For Computer Assisted PABX Service", by E. H. Shoobridge, International Conference on Communications Equipment and Systems, Brighton, England, Jun. 1976, pp. 245-248.
"Designing a Microprocessor Driven Multipurpose Peripheral Controller", Richard F. Binder, Computer Design, Apr. 1979, pp. 83-91.
"Multifunction Equipment", Ely S. Lurin Telecommunications, Oct. 1979, pp. 79-82.

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