Telephonic communications – Emergency or alarm communications – Central office responsive to emergency call or alarm
Reexamination Certificate
2011-05-31
2011-05-31
Woo, Stella L (Department: 2614)
Telephonic communications
Emergency or alarm communications
Central office responsive to emergency call or alarm
C379S037000
Reexamination Certificate
active
07953210
ABSTRACT:
A switch proxy comprising a controller, a translations database and a switching fabric are connected to a trunk group between a remote terminal and its controlling local switching system. The switch proxy monitors control and alarm signals to and from the switching system on the trunk. In the event of loss of control signals from the host switching system, the switch proxy intercepts requests for service, etc. from a calling telephone connected to the remote terminal and performs a look up in the translation database. If the call can be completed without the controlling switching system the call is looped back to the remote terminal. The translation database is maintained by a switch proxy management system that receives change orders from the local exchange carrier. The switch proxy management system forwards relevant changes to the switch proxy's translation database in the field.
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Elder Joseph Marcus
Ruether Peter Gade
Aztek Engineering, Inc.
Dorr, Carson & Birney, P.C.
Woo Stella L
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