AC/DC phone line detector
AssigneeWest Corporation
InventorsYvon Desnoyers, Alain Gingras, Gilbert Vellet
Life of this patent
Estimating the term…
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.
Claims18
An alternating current and direct current (AC/DC) telephone line detection system, the system comprising:
- an electronic circuit that is floating with reference to ground;
- a first analog-to-digital (A/D) converter coupled to the electronic circuit and configured to:
- detect ringing voltages from DC voltages carried by a telephone line, and
- detect a state of the telephone line based on a polarity of a DC signal from a battery;
- a second A/D converter coupled to the electronic circuit and configured to:
- detect caller identification information from AC voltages carried by the telephone line, the second A/D converter further configured to detect audio transmitted during a phone call and on-hook transmissions transmitted between calls;
- and
- a processor configured to:
- output information about signals detected by the first A/D converter and the second A/D converter.
A telephone system, comprising:
- a microcontroller configured to detect caller identification (ID) information from a telephone line being input to the telephone system and output the detected caller ID information to a display, wherein the microcontroller comprises:
- an electronic circuit that is floating with reference to ground;
- a first analog-to-digital (A/D) converter coupled to the electronic circuit and configured to:
- detect ringing voltages from DC voltages carried by a telephone line, and
- detect a state of the telephone line based on a polarity of a DC signal from a battery;
- a second A/D converter coupled to the electronic circuit and configured to:
- detect caller identification information from AC voltages carried by the telephone line, the second A/D converter further configured to detect audio transmitted during a phone call and on-hook transmissions transmitted between calls;
- and
- a processor configured to:
- output information about signals detected by the first A/D c converter and the second A/D converter.
A method, comprising:
- receiving a telephone signal via a telephone line communicably coupled to a central office, the telephone signal comprising alternating current (AC) and direct current (DC) voltages;
- detecting, via a first analog-to-digital (A/D) converter, ringing voltages from DC voltages of the telephone signal;
- detecting, via a first analog-to-digital (A/D) converter a state of the telephone line based on a polarity of a DC signal from a battery;
- detecting, via a second A/D converter, caller identification information from AC voltages of the telephone signal;
- detecting, via the second A/D converter, audio transmitted during a phone call and on-hook transmissions transmitted between calls;
- and
- controlling, via a processor, signals detected by first A/D converter and the second A/D converter,
- wherein the first A/D converter, the second A/D converter, and the processor, are electronically connected to each other and coupled to an electronic circuit that is floating with reference to ground.
Dependencies are inferred from the claim text.