US5638366A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Data transport for internal messaging
Assignee: Microsemi Semiconductor ULC
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Filing: 1992-12-24
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Granted: 1997-06-10
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Expires: 2012-12-24
Abstract
Abstract A communications bus is established by connecting a plurality of transceivers to a central automatic space division switching apparatus, and connecting the transceivers in series through the switching apparatus to form a folded bus structure, one of the transceivers forming a bus master for initiating and terminating trains of signals.
Inventors
- 👤 Thomas A. Gray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:56
CPC Classifications
H; H04; H04M; H04M9/00; H04M9/02; H04L; H04L12/00; H04L12/28; H04L12/42; H04L12/423
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
133 words
A communication switching system comprising a plurality of signal generating and receiving nodes, and an automatic central space division switching means for connecting at least some of said nodes serially forming a bus, one of said nodes forming a master node terminating said bus and for generating a signal train containing messages for said nodes, applying said signal train to a beginning of said bus, and receiving said signal train from an end of said bus, in which said signal train contains a start of train (SOT) byte, a master node end of train (EOT) byte and said messages sandwiched between said SOT and EOT bytes, and where in said nodes include means for appending messages to said signal train followed by an EOT byte in replacement of said master node EOT byte.
Claim 2
Dependent Claim
133 words
A communication switching system comprising a plurality of signal generating and receiving nodes, and an automatic central space division switching means for connecting at least some of said nodes serially forming a bus, one of said nodes forming a master node terminating said bus and for generating a signal train containing messages for said nodes, applying said signal train to a beginning of said bus, and receiving said signal train from an end of said bus, in which said signal train contains a start of train (SOT) byte, a master node end of train (EOT) byte and said messages sandwiched between said SOT and EOT bytes, and where in said nodes include means for appending messages to said signal train followed by an EOT byte in replacement of said master node EOT byte.
Claim 3
Dependent Claim
36 words
A system as defined in claim 1 in which said bus is formed of an optical fiber carrying said signal train to and from said automatic central space division switching means from and to each node.
Claim 4
Dependent Claim
49 words
A system as defined in claim 2 including means in said automatic central space division switching means and nodes for applying one or both of node control and node messaging signals to said bus, whereby additional communications are provided between said automatic central space division switching means and nodes.
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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) | 2000-06-09 | 2000-12-09 | 2001-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-06-09 | 2004-12-09 | 2005-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-06-09 | 2008-12-09 | 2009-06-10 | $7700.00 | Window Closed / Lapsed |