Line powered modem
US4395590A · kind A · utility
86Cited by
2References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 3, 1980 |
| Grant date | Jul 26, 1983 |
| Priority date | — |
| Expiry date | Nov 3, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M11/06
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A modem for coupling a data terminal or other apparatus to a telephone line and deriving its operating power for both transmitting and receiving operation from the telephone line, and providing electrical isolation between the telephone line and the data terminal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.