Malfunction detection and changeover apparatus for data communications system
US3962546A · kind A · utility
8Cited by
5References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 29, 1974 |
| Grant date | Jun 8, 1976 |
| Priority date | — |
| Expiry date | Oct 29, 1994 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M11/06
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A data terminal is connected to a telephone line for data transmission and reception. When a malfunction is detected in the data terminal, the data terminal is automatically disconnected from the telephone line and a telephone set connected to the telephone line. After a predetermined time interval, the telephone set is automatically disconnected from the telephone line and the data terminal re-connected to the telephone line.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.