Telephone circuit controller apparatus
US6980634B1 · kind B1 · utility
Inventor
Key dates
| Filing date | Oct 16, 2002 |
| Grant date | Dec 27, 2005 |
| Priority date | — |
| Expiry date | Feb 1, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M1/7385
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A controller selectively connecting and disconnecting extensions from a telephone line includes a plurality of extension connector ports selectively connected to a communication device and a plurality of relay switches. Each relay switch has three terminals and a toggle movable between connecting the first and second terminals and connecting the first and third terminals. Each first terminal is connected to a respective extension connector port. A processor is connected to an outside telephone line. Entry of a predetermined command code prevents use of the communication device connected to selective toggles. A plurality of tone detector modules each generate a command signal controlling the processor to connect a respective extension to the outside telephone line. A plurality of tone location identifiers are each activated upon receipt of a control signal from the respective tone detector module for generating a unique signal by which the processor distinguishes the extension connector ports.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.