US5818349A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Switch composed of identical switch modules
Assignee: Nvision Inc
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Filing: 1993-01-21
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Granted: 1998-10-06
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Expires: 2013-01-21
Abstract
Abstract A crosspoint switch having M input terminals and N output terminals has (M/m) times (N/n) crosspoint switch modules each having m input conductors and n output conductors. (M/m) of the crosspoint switch modules have their input conductors connected to the M input terminals respectively of the crosspoint switch, and (N/n) of the modules have their output conductors connected to the N output terminals respectively of the crosspoint switch. The input conductors of the first module are connected to respective input conductors of a second module and the output conductors of the first module are connected to respective output conductors of a third module.
Inventors
- 👤 Birney D. Dayton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:21
CPC Classifications
H; H04; H04Q; H04Q3/00; H04Q3/64; H04Q3/68; H04Q3/685; H04Q3/42; H04Q3/52; H04Q3/521
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
147 words
A crosspoint switch having M input terminals and N output terminals and comprising (M/m) times (N/n) crosspoint switch modules each having m input conductors, n output conductors, means operable selectively for interconnecting any one of the m input conductors and any selected set of the n output conductors, n input expansion conductors, and n input expansion crosspoint elements operable selectively to connect the n input expansion conductors to the n output conductors respectively, (M/m) of the modules having their input conductors connected to the M input terminals respectively of the crosspoint switch, (N/n) of the modules having their output conductors connected to the N output terminals respectively of the crosspoint switch, the input conductors of the first module being connected to respective input conductors of a second module and the output conductors of the first module being connected to respective input expansion conductors of a third module.
Claim 2
Dependent Claim
147 words
A crosspoint switch having M input terminals and N output terminals and comprising (M/m) times (N/n) crosspoint switch modules each having m input conductors, n output conductors, means operable selectively for interconnecting any one of the m input conductors and any selected set of the n output conductors, n input expansion conductors, and n input expansion crosspoint elements operable selectively to connect the n input expansion conductors to the n output conductors respectively, (M/m) of the modules having their input conductors connected to the M input terminals respectively of the crosspoint switch, (N/n) of the modules having their output conductors connected to the N output terminals respectively of the crosspoint switch, the input conductors of the first module being connected to respective input conductors of a second module and the output conductors of the first module being connected to respective input expansion conductors of a third module.
Claim 3
Dependent Claim
32 words
A crosspoint switch according to claim 1, wherein each switch module comprises m×n crosspoint elements operable selectively for interconnecting any combination composed of one input conductor and any set of output conductors.
Claim 4
Dependent Claim
84 words
A crosspoint switch according to claim 1, wherein each of the n output conductors has first and second opposite ends and each input expansion crosspoint element is disposed at the first end of an output conductor, and wherein the third module comprises n output buffers connected to its output conductors respectively at said second end thereof and n input expansion buffers connected to its input expansion conductors respectively, the input expansion buffers having input terminals connected to respective output terminals of the first module.
Claim 5
Dependent Claim
85 words
A crosspoint switch according to claim 1, wherein each of the input conductors has first and second opposite ends and each of the first and second modules includes m input buffers connected to its input conductors respectively at said first end thereof, the first module includes m output expansion buffers connected to its input conductors respectively at said second end thereof, and the output expansion buffers of the first module have respective outputs connected to respective inputs of the input buffers of the second module.
Claim 6
Dependent Claim
90 words
A crosspoint switch according to claim 1, wherein each of the output conductors has first and second opposite ends and each input expansion crosspoint element is disposed at the first end of an output conductor, and wherein each module comprises n output buffers connected to its output conductors respectively at said second end thereof and n input expansion buffers connected to its input expansion conductors respectively, the output buffers of the first module having output terminals connected to the input terminals of respective input expansion buffers of the third module.
Claim 7
Dependent Claim
82 words
A crosspoint switch according to claim 1, wherein each input conductor of each switch module has first and second ends and is connected at its first end to a signal in terminal of the switch module and at its second end to an output expansion terminal of the switch module, and each switch module comprises n matrix crosspoint elements distributed along each input conductor and each operable to connect the input conductor to any set of output conductors of the switch module.
Claim 8
Dependent Claim
40 words
A crosspoint switch according to claim 1, comprising a fourth crosspoint switch module having its input conductors connected to respective input conductors of the third module and its input expansion conductors connected to respective output conductors of the second module.
Claim 9
Dependent Claim
119 words
A crosspoint switch according to claim 7, wherein each input conductor of each switch module has first and second opposite ends and is connected at its first end to a signal in terminal of the switch module and at its second end to an output expansion terminal of the switch module, each output conductor has first and second opposite ends, each input expansion crosspoint element is at the first end of an output conductor, there is a signal out terminal of the switch module at the second end of each output conductor, and each switch module comprises m matrix crosspoint elements distributed along each output conductor and each operable selectively to connect one input conductor to the output conductor.
Claim 10
Dependent Claim
136 words
A crosspoint switch according to claim 7, wherein the third module comprises m input buffers connected to its input conductors respectively at a first end thereof and m output expansion buffers connected to its input conductors respectively at a second end thereof, the second module has n output buffers connected to its output conductors respectively at a first end thereof, and the fourth module has m input buffers connected to its input conductors at a first end thereof and n input expansion buffers connected to its n input expansion conductors respectively, and wherein the m output expansion buffers of the third module are connected to the m input buffers respectively of the fourth module and the n output buffers of the second module are connected to the n input expansion buffers respectively of the fourth module.
Claim 11
Dependent Claim
86 words
A crosspoint switch module comprising: m input conductors each having first and second opposite ends, m input buffers connected to the input conductors respectively at the first end thereof, m output expansion buffers connected to the input conductors respectively at the second end thereof, n output conductors, m×n crosspoint elements operable selectively for connecting any selected input conductor to any selected set of output conductors, n input expansion conductors, and n input expansion crosspoint elements for connecting the input expansion conductors to the output conductors respectively.
Claim 12
Dependent Claim
86 words
A crosspoint switch module comprising: m input conductors each having first and second opposite ends, m input buffers connected to the input conductors respectively at the first end thereof, m output expansion buffers connected to the input conductors respectively at the second end thereof, n output conductors, m×n crosspoint elements operable selectively for connecting any selected input conductor to any selected set of output conductors, n input expansion conductors, and n input expansion crosspoint elements for connecting the input expansion conductors to the output conductors respectively.
Claim 13
Dependent Claim
67 words
A crosspoint switch module according to claim 10, wherein each of the output conductors has first and second opposite ends and the n input expansion crosspoint elements are at the first ends respectively of the output conductors, and the module comprises n output buffers connected to the output conductors respectively at the second end thereof and n input expansion buffers connected to the input expansion conductors respectively.
Claim 14
Dependent Claim
98 words
A crosspoint switch module comprising: m input conductors, n output conductors each having first and second opposite ends, n output buffers connected to the output conductors respectively at the second end thereof, m×n crosspoint elements operable selectively for connecting any selected input conductor to any selected set of output conductors, n input expansion conductors, n input expansion buffers connected to the input expansion conductors respectively, and n input expansion crosspoint elements for connecting the input expansion conductors to the output conductors respectively, the n input expansion crosspoint elements being at the first ends respectively of the output conductors.
Claim 15
Dependent Claim
98 words
A crosspoint switch module comprising: m input conductors, n output conductors each having first and second opposite ends, n output buffers connected to the output conductors respectively at the second end thereof, m×n crosspoint elements operable selectively for connecting any selected input conductor to any selected set of output conductors, n input expansion conductors, n input expansion buffers connected to the input expansion conductors respectively, and n input expansion crosspoint elements for connecting the input expansion conductors to the output conductors respectively, the n input expansion crosspoint elements being at the first ends respectively of the output conductors.
Claim 16
Dependent Claim
138 words
A crosspoint switch having M input terminals and N output terminals and comprising (M/m) times (N/n) crosspoint switch modules each having m signal in terminals and n signal out terminals, (M/m) of the modules having their signal in terminals connected to the M input terminals respectively of the crosspoint switch, (N/n) of the modules having their signal out terminals connected to the N output terminals respectively of the crosspoint switch, and wherein the first module has m output expansion terminals that are connected to respective signal in terminals of a second module and a third module has n input expansion terminals connected to respective signal out terminals of the first module, and the third module also comprises n switch elements operative selectively to connect the input expansion terminals of the third module to respective signal out terminals thereof.
Claim 17
Dependent Claim
138 words
A crosspoint switch having M input terminals and N output terminals and comprising (M/m) times (N/n) crosspoint switch modules each having m signal in terminals and n signal out terminals, (M/m) of the modules having their signal in terminals connected to the M input terminals respectively of the crosspoint switch, (N/n) of the modules having their signal out terminals connected to the N output terminals respectively of the crosspoint switch, and wherein the first module has m output expansion terminals that are connected to respective signal in terminals of a second module and a third module has n input expansion terminals connected to respective signal out terminals of the first module, and the third module also comprises n switch elements operative selectively to connect the input expansion terminals of the third module to respective signal out terminals thereof.
Claim 18
Dependent Claim
121 words
A crosspoint switch according to claim 13, wherein the third module comprises m input conductors each having first and second opposite ends and each connected at its first end to a signal in terminal of the third module and at its second end to an output expansion terminal of the third module, n output conductors each having first and second opposite ends, m primary crosspoint elements distributed along each output conductor and each operable selectively to connect one input conductor to the output conductor, and wherein there is an input expansion terminal of the third module at the first end of each output conductor and a signal out terminal of the third module at the second end of each output conductor.
Claim 19
Dependent Claim
38 words
A crosspoint switch according to claim 13, wherein each switch module comprises n matrix crosspoint elements distributed along each input conductor and operable selectively to connect the input conductor to any set of output conductors of the module.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-10-05 | 2002-04-06 | 2002-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-10-05 | 2006-04-06 | 2006-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-10-05 | 2010-04-06 | 2010-10-06 | $7700.00 | Window Closed / Lapsed |