US5454025A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Switch bypass for a public safety calling system
Assignee: Rockwell Firstpoint Contact Corp
•
Filing: 1992-11-12
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Granted: 1995-09-26
•
Expires: 2012-11-12
Abstract
Abstract A switch bypass (10) for a Public Safety Calling System (12) having a first switch A for routing telephone calls, a second switch B for routing telephone calls, and a device 14a and 14b for bypassing the first switch A responsive to a failure in the first switch, and for transferring the call to the second switch B.
Inventors
- 👤 Robert J. Mulrow
- 👤 Donald J. Jester
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:29
CPC Classifications
H; H04; H04Q; H04Q3/00; H04Q3/0016
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
71 words
A switch bypass for a Public Safety Calling System, comprising: first switch means for routing telephone calls and having a plurality of cross connects for bypassing the first switch means responsive to a failure in the first switch means; and second switch means for routing telephone calls and receiving the call from the first switch means, and for routing the call back to a cross connect of the first switch means.
Claim 2
Dependent Claim
71 words
A switch bypass for a Public Safety Calling System, comprising: first switch means for routing telephone calls and having a plurality of cross connects for bypassing the first switch means responsive to a failure in the first switch means; and second switch means for routing telephone calls and receiving the call from the first switch means, and for routing the call back to a cross connect of the first switch means.
Claim 3
Dependent Claim
94 words
A switch bypass for a Public Safety Calling System, comprising: first switch means for routing telephone calls; a digital cross connect associated with the first switch means; second switch means for routing telephone calls; means for bypassing the first switch means responsive to a failure in the first switch means, and for transferring the call to the second switch means; and means for routing the call from the second switch means through the digital cross connect associated with the first switch means during failure of the first switch means to the desired receiving party.
Claim 4
Dependent Claim
94 words
A switch bypass for a Public Safety Calling System, comprising: first switch means for routing telephone calls; a digital cross connect associated with the first switch means; second switch means for routing telephone calls; means for bypassing the first switch means responsive to a failure in the first switch means, and for transferring the call to the second switch means; and means for routing the call from the second switch means through the digital cross connect associated with the first switch means during failure of the first switch means to the desired receiving party.
Claim 5
Dependent Claim
19 words
The switch bypass of claim 2 wherein the transferring means includes a cross connect in the first switch means.
Claim 6
Dependent Claim
21 words
The switch bypass of claim 2 wherein the bypassing means includes at least one cross connect in the first switch means.
Claim 7
Dependent Claim
89 words
A switch bypass for a Public Safety Calling System, comprising: first switch means for routing telephone calls and having means for bypassing the first switch means responsive to a fault in the first switch means; a digital cross connect associated with the first switch means; and second switch means for routing telephone calls and having means for receiving the call from the first switch means and for routing the call back to the digital cross connect of the first switch means during a failure of the first switch means.
Claim 8
Dependent Claim
89 words
A switch bypass for a Public Safety Calling System, comprising: first switch means for routing telephone calls and having means for bypassing the first switch means responsive to a fault in the first switch means; a digital cross connect associated with the first switch means; and second switch means for routing telephone calls and having means for receiving the call from the first switch means and for routing the call back to the digital cross connect of the first switch means during a failure of the first switch means.
Claim 9
Dependent Claim
21 words
The switch bypass of claim 5 wherein the bypassing means includes at least one cross connect in the first switch means.
Claim 10
Dependent Claim
23 words
The switch bypass of claim 5 wherein the second switch routing means includes at least one cross connect in the first switch means.
Claim 11
Dependent Claim
83 words
A switch bypass for a Public Safety Calling System, comprising: first switch means for routing telephone calls; a digital cross connect associated with the first switch means; second switch means for routing telephone calls; and means for overflowing a call placed to the first switch means to the second switch means responsive to a failure in the first switch means, and for routing the call back to the digital cross connect of the first switch means during failure of the first switch means.
Claim 12
Dependent Claim
83 words
A switch bypass for a Public Safety Calling System, comprising: first switch means for routing telephone calls; a digital cross connect associated with the first switch means; second switch means for routing telephone calls; and means for overflowing a call placed to the first switch means to the second switch means responsive to a failure in the first switch means, and for routing the call back to the digital cross connect of the first switch means during failure of the first switch means.
Claim 13
Dependent Claim
28 words
The switch bypass of claim 8 including means for restoring the routing of calls by the first switch means responsive to renewed operation of the first switch means.
Claim 14
Dependent Claim
37 words
The switch bypass of claim 9 wherein the second switch means includes means for bypassing a call placed to the second switch means to the first switch means responsive to a fault in the second switch means.
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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) | 1998-09-25 | 1999-03-27 | 1999-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-09-25 | 2003-03-27 | 2003-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-09-25 | 2007-03-27 | 2007-09-26 | $7700.00 | Window Closed / Lapsed |