Apparatus for switching telephone line a response device, a data terminal or a telephone
US4660218A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 14, 1985 |
| Grant date | Apr 21, 1987 |
| Priority date | — |
| Expiry date | Mar 14, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S379/902
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A switching apparatus is proposed which automatically switches between a telephone set connected to a telephone line and a terminal device for data communication in accordance with a signal sent through the telephone line. When an incoming call signal is detected, the telephone lines are engaged with the telephone set, and a response signal is sent out onto the telephone line. Thereafter, when a control signal or the like is received by the switching apparatus, the terminal device is automatically engaged with the telephone line. When the control signal is not sent to the switching apparatus, the called party can communicate with the calling party when the telephone set is set in the off-hook state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.