Telephonic communications – Emergency or alarm communications – Central office responsive to emergency call or alarm
Reexamination Certificate
2006-03-14
2006-03-14
Chan, Wing F. (Department: 2643)
Telephonic communications
Emergency or alarm communications
Central office responsive to emergency call or alarm
C379S037000, C379S039000, C725S106000
Reexamination Certificate
active
07012994
ABSTRACT:
An emergency calling system and method via a cable modem includes a cable modem connected to a Public Switched Telephone Network (PSTN) backup line in a cable modem-based Internet telephone service to transmit the emergency telephone number inputted by a subscriber telephone to the PSTN via the PSTN backup line. This enables an emergency calling function via a PSTN backup circuit and stable PSTN in a cable modem-based Internet telephone service. This also allows a cable modem-based Internet telephone service to promptly provide urgent emergency calling via the PSTN line in case of an emergency.
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Bushnell , Esq. Robert E.
Chan Wing F.
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