US5014269A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microcomputer integrating a digital subscriber terminal for an integrated service digital network
Assignee: JS TELECOMMUNICATIONS 36-38 RUE de la PRINCESSE 78430 LOUVECIENNES (FRANCE) A FRENCH CORP OF FRANCE
•
Filing: 1989-06-30
•
Granted: 1991-05-07
•
Expires: 2009-06-30
Abstract
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.
Inventors
- 👤 Jean A. Picandet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:47
CPC Classifications
H; H04; H04Q; H04Q11/00; H04Q11/04; H04Q11/0428; H04M; H04M3/00; H04M3/42; H04M3/42314; H04Q3/00; H04Q3/58; H04Q3/62; H04Q3/625; H04M3/42323; H04Q2213/00; H04Q2213/09; H04Q2213/093; H04Q2213/096; H04Q2213/13031; H04Q2213/13093; H04Q2213/13103; H04Q2213/13106; H04Q2213/13209; H04Q2213/13292; H04Q2213/13299; H04Q2213/299
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
135 words
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, 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.
Claim 2
Dependent Claim
135 words
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, 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.
Claim 3
Dependent Claim
47 words
A microcomputer according to claim 1, and which includes several second electronic circuit boards that are connected to said first bus to communicate with said first circuits, and that are interconnected with each other by means of a second bus that is separate from said first bus.
Claim 4
Dependent Claim
30 words
A microcomputer according to claim 2, wherein said second bus includes at least one line means grouping data transmission channels of which at least one constitutes a telephone signalling channel.
Claim 5
Dependent Claim
16 words
A microcomputer according to claim 3, wherein said data transmission channels carry time division multiplex channels.
Claim 6
Dependent Claim
19 words
A microcomputer according to claim 3, wherein access to the signalling channel with a contention protocol or is arbitrated.
Claim 7
Dependent Claim
56 words
A microcomputer according to claim 2, wherein said second bus has an independent power supply distribution line means, the power supply distribution to said first circuits being provided by another power supply distribution line means, whereby power supply to said second circuit boards may be maintained when power supply to said first circuits is turned off.
Claim 8
Dependent Claim
37 words
A microcomputer according to claim 2, wherein said second bus includes an independent time base distribution line means, the supply of a time base to said first circuits being provided by another time base distribution line means.
Claim 9
Dependent Claim
74 words
A microcomputer according to claim 2, wherein said management and switching circuits are distributed over a plurality of said second electronic circuit boards, and each said second electronic circuit board includes its own 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 interface circuits.
Claim 10
Dependent Claim
151 words
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.
Claim 11
Dependent Claim
151 words
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.
Claim 12
Dependent Claim
27 words
A microcomputer according to claim 9, including a circuit board with data processing circuit means for effecting data crossover between said first bus and said second bus.
Claim 13
Dependent Claim
62 words
A microcomputer according to claim 9, wherein said second bus includes power supply distribution line means for supplying electrical power to said ISDN DST circuit boards independently of electrical power supply to said first circuit boards, such that said ISDN DST circuit boards may remain operational to enable continued telephone functions when power supply to said first circuit boards is turned off.
Claim 14
Dependent Claim
37 words
A microcomputer according to claim 9, wherein said second bus includes time base distribution line means for supplying a time base to said ISDN DST circuit boards independently from a time base supplied to said circuit boards.
References Cited (Backward Citations)
US4463351A
Cited
JPS5869193A
Cited
US4663748A
Cited
US4640989A
Cited
EP0192894A2
Cited
DE3534918A1
Cited
FR2600913A1
Cited
US4740955A
Cited
US4757497A
Cited
US4821034A
Cited
US4823338A
Cited
US4823338B1
Cited
FR2623042A1
Cited
US4866703A
Cited
US4835769A
Cited
US4864601A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-05-06 | 1994-11-05 | 1995-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-05-06 | 1998-11-05 | 1999-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-05-06 | 2002-11-05 | 2003-05-07 | $7700.00 | Window Closed / Lapsed |