Telephone ringing monitoring and control system
US5040209A · kind A · utility
Inventors
Key dates
| Filing date | Sep 18, 1989 |
| Grant date | Aug 13, 1991 |
| Priority date | — |
| Expiry date | Sep 18, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S379/911
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A control system for use in a conventional telecommunications system comprising a common telephone line to which plural telephones may be connected. The line is arranged to carry plural series of electrical ring-initiating signals, each for a respective one of plural telephone numbers serviced by the line. The control system comprises plural controllable ports and a controller. Each of the ports is associated with a respective one of the series of ring-initiating signals and is arranged to have a telephone and/or some auxiliary device, e.g., FAX machine, answering machine, computer, etc., connected thereto. The controller is coupled to the line and the controllable ports and detects an analyzes each of the plural ring-initiating signals on the line and also monitors the status of the line, e.g., if there is a "busy signal", an "on-hook signal", an "off-hook signal", or other signal on it. Depending upon line conditions the system controls the ports to which the telephones or other devices are connected, e.g., it precludes the first of the ring-initiating signals from reaching any port, analyzes those signals and thereafter diverts the remaining ring-initiating signals of any partic…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.