Apparatus for cord-free hands-free telephony
US7187768B1 · kind B1 · utility
2Cited by
2References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 4, 2004 |
| Grant date | Mar 6, 2007 |
| Priority date | — |
| Expiry date | Jun 1, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M1/82
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A telephone line interface includes a ring detect circuit for activating a RF transceiver and thereby notifying the RF headset of a ringing condition on a telephone line. A wire conversion circuit separates transmit voice signals from receive voice signals and provides the separated voice signals to the RF transceiver. A firmware allows the electronic hook switch to go off hook only when the line is ringing or only when the line is off hook.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.