Single channel subscriber carrier system
US4653046A · kind A · utility
1Cited by
6References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 18, 1984 |
| Grant date | Mar 24, 1987 |
| Priority date | — |
| Expiry date | Jun 18, 2004 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q11/02
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
There is provided an improved subscriber carrier system which enables the transmission of both voice frequencies and carrier frequencies by a common line without the need for a battery at the subscriber carrier terminal to supply power for the subscriber carrier electronics. A high voltage power supply is utilized to supply power, both for the voice frequency terminal and the subscriber carrier terminal. Loop supervision circuitry is isolated from the power supply. Ringing signals are detected and regenerated at a frequency to pass through the isolation circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.