Telephonic communications – Emergency or alarm communications – Central office responsive to emergency call or alarm
Patent
1992-11-12
1995-02-07
Peng, John K.
Telephonic communications
Emergency or alarm communications
Central office responsive to emergency call or alarm
379 48, 379221, H04M 700, H04M 1100
Patent
active
053881451
ABSTRACT:
An internode routing for an emergency telephone system (14) having a first switch (16) for routing telephone calls, a second switch (18) for routing telephone calls, a device (16 or 18) for defining emergency service zones for each of the first and second switches (16 or 18), and a device (16) for transferring a telephone call placed to the first switch (16) to the second switch (18) for completion to a public safety answering point responsive to the condition of the public safety answering point being located in the emergency service zone associated with the second switch (18).
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E. G. DeNigris et al., "Enhanced 911: emergency calling with a plus", Mar. 1980, Bell Laboratory Record, pp. 75-79.
Jester Donald J.
Mulrow Robert J.
Hamann H. F.
Patti C. B.
Peng John K.
Rockwell International Corporation
Wu Daniel J.
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