Microcomputer integrating a digital subscriber terminal for an integrated service digital network
First Claim
1. A microcomputer comprising:
- first electronic circuit boards on which are fitted first circuits for carrying out central processing unit, memory, and input/output functions, and which are interconnected by a first bus, andat least one second electronic circuit board having interface circuits for connecting a plurality of terminals to an Integrated Service Digital Network (ISDN) through line means,means being provided for switching of data transmitted over said line means so as to constitute an ISDN Digital Subscriber Terminal (DST) integrated within the microcomputer,wherein management and switching of data transmission over said line means and signalling required for exchanging said data are carried out by means of management and switching circuits provided on said at least one second electronic circuit board without calling on the resources of the central processing unit of the microcomputer.
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Accused Products
Abstract
A microcomputer integrates a Digital Subscriber Terminal (DST) adapted to an Integrated Services Digital Network (ISDN). In addition to the electronic circuit boards that ensure all the normal data processing and management functions (central processing unit, input/output circuits, ROM and RAM circuits), the microcomputer is equipped with an additional set of circuit boards for interfacing with an ISDN system, so as to constitute a microcomputer-contained DST for an ISDN. The management and switching of data concerning the ISDN system are provided by the additional set of circuits, so that the DST function is achieved without calling on the resources of the microcomputer'"'"'s central processing unit. In this way, the essential telephone switching function is obtained without calling on the PC'"'"'s central processing unit, while the integration of the DST within the PC makes it possible to benefit from the computer'"'"'s data processing functions with a minimum amount of equipment for a maximum number of functions.
39 Citations
12 Claims
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1. A microcomputer comprising:
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first electronic circuit boards on which are fitted first circuits for carrying out central processing unit, memory, and input/output functions, and which are interconnected by a first bus, and at least one second electronic circuit board having interface circuits for connecting a plurality of terminals to an Integrated Service Digital Network (ISDN) through line means, means being provided for switching of data transmitted over said line means so as to constitute an ISDN Digital Subscriber Terminal (DST) integrated within the microcomputer, wherein management and switching of data transmission over said line means and signalling required for exchanging said data are carried out by means of management and switching circuits provided on said at least one second electronic circuit board without calling on the resources of the central processing unit of the microcomputer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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- 9. A microcomputer which comprises means including a plurality of first circuit boards interconnected by a first bus for carrying out central processing unit, memory, and input/output functions, and which has integrated therein a plurality of Integrated Service Digital Network (ISDN) Digital Subscriber Terminal (DST) circuit boards connected to said first bus, interconnected with each other via a second bus which is independent of said first bus, and having data management and switching circuit means for enabling DST telephone switching independently of said first bus, with each said ISDN DST circuit board including a central processing unit with associated memory means, means for coupling said central processing unit and said memory means to said first bus, means for coupling said central processing unit and said memory means to said second bus, and line connection circuit means including a plurality of telephone line interface circuits for connection to at least one telephone line.
Specification