Abstract: An example AC/DC phone line detection system may include one or more of an electronic circuit that is floating with reference to ground, a first A/D converter coupled to the electronic circuit and configured to detect ringing voltages from DC voltages included in a telephone line, a second A/D converter coupled to the electronic circuit and configured to detect caller identification information from AC voltages included in the telephone line, and a processor configured to control signals detected by the first and second A/D convertors and output information about the signals to call taking equipment.

Abstract: An example computing system may include one or more of a chassis including an enclosure and a communication interface, and a plurality of server modules that form a PSAP, housed by the enclosure of the chassis, and communicating via the communication interface, wherein the plurality of server modules include a communication server module that interconnects the PSAP to a radio signal, a recorder, a telephone line, and an operator call talking system, a call talking server module that executes a call-taking application for outputting audio of the PSAP to the operator call talking system, and a computer aided dispatch (CAD) server module that outputs a computer aided dispatch for emergency vehicles and/or emergency services via a display device of the operator call talking system.

Abstract: An example AC/DC phone line detection system may include one or more of an electronic circuit that is floating with reference to ground, a first A/D converter coupled to the electronic circuit and configured to detect ringing voltages from DC voltages included in a telephone line, a second A/D converter coupled to the electronic circuit and configured to detect caller identification information from AC voltages included in the telephone line, and a processor configured to control signals detected by the first and second A/D convertors and output information about the signals to call taking equipment.