Switch bypass for a public safety calling system
First Claim
Patent Images
1. 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.
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Accused Products
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.
38 Citations
10 Claims
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1. A switch bypass for a Public Safety Calling System, comprising:
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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.
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2. A switch bypass for a Public Safety Calling System, comprising:
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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. - View Dependent Claims (3, 4)
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5. A switch bypass for a Public Safety Calling System, comprising:
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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. - View Dependent Claims (6, 7)
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8. A switch bypass for a Public Safety Calling System, comprising:
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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. - View Dependent Claims (9, 10)
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Specification