Microprocessor controller for simultaneously controlling a PBX and providing multiple user access for general purpose data processing
US4440986A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 27, 1980 |
| Grant date | Apr 3, 1984 |
| Priority date | — |
| Expiry date | Oct 27, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M11/00
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
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…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.