Telephone line and instrument tester
US4827498A · kind A · utility
Inventor
Key dates
| Filing date | Aug 17, 1984 |
| Grant date | May 2, 1989 |
| Priority date | — |
| Expiry date | Aug 17, 2004 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M1/24
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A telephone line and instrument tester is disclosed which is operable by a consumer for determining whether a malfunction in a telephone system is caused by a malfunction in a telephone instrument of the system or by a malfunction in source related equipment of the system, such as a telephone line leading to a jack of the system. The tester is receivable in a modular telephone jack for testing the operation of source related equipment of the system and a modular plug of a telephone cord is receivable in the tester for testing the operation of a telephone instrument attached to the cord. A circuit in the tester is responsive to the flow of current therethrough for providing an indication of the operation of the source related equipment and/or the telephone instrument.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.