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AssigneeAT&T Bell Laboratories
InventorsJoseph M. Brozovich, Nicholas M. DeVito, Douglas C. Kroupa, Paul E. Renn, Paul M. Simek, David A. Snyder, James L. Turner
Estimating the term…
A line-based 911 system and method that completes an emergency call from a telephone to a PSAP comprising a multiplicity of operator stations connected by individual lines to a telephone switching system. An emergency call is routed to the termination ports of the switching system associated with a PSAP. Each of the termination ports is connected to one of the multiplicity of operator stations via its associated line, thereby establishing a path from the telephone to the operator station, the CPN of the calling telephone is delivered to the selected operator station and the operator station obtains location information of the telephone in accordance with the CPN, which is then displayed.
A system for delivering emergency information from a telephone to an operator station in a public safety answering point (PSAP) through a public telephone network in response to an emergency number entered at said telephone, said telephone having an automatic number identification (ANI) defining a billing number of said telephone and a calling party number (CPN) defining a directory number of said telephone, said system comprising:
A method of providing emergency telephone service in a public telephone network, said telephone network comprising telephone switching systems, each having a plurality of telephones connected thereto, each of said telephones having an automatic number identification (ANI) defining a billing number and a calling party number (CPN) defining a directory number, and at least one public safety answering point (PSAP) connected to a selected one of said switching systems, said PSAP having a multiplicity of operator stations connected to said selected one of said switching systems by a corresponding multiplicity of lines, each of said lines providing a voice path and a separate data path between its operator station and said selected one of said switching systems said method comprising:
Dependencies are inferred from the claim text.