Telephone headset amplifier and method of operation
US5982879A · kind A · utility
14Cited by
18References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 3, 1992 |
| Grant date | Nov 9, 1999 |
| Priority date | — |
| Expiry date | Apr 3, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M3/51
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An amplifier in a telephone call station which is capable of indicating to a telephone call distribution system whether a microphone headset is in electrical communication with the telephone call station. The amplifier simulates being physically disconnected from the telephone call distribution system when the microphone is disconnected from the amplifier thus informing the telephone call distribution system to redirect telephone calls originally destined for that telephone call station.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.