Dual-circuit telephony
US6389119B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 25, 1999 |
| Grant date | May 14, 2002 |
| Priority date | — |
| Expiry date | Mar 25, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S379/90
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A telephone instrument comprises a mechanism for providing signals for transmission, a mechanism for converting signals received by the instrument into output signals, a switching circuit for selectively establishing and terminating a connection between the instrument and a circuit-switched telephone network and for selectively establishing and terminating a connection between the instrument and a packet-switched communication network. When calling, the instrument signals over the circuit-switched network for a network address for the called instrument and the packet-switched network and establishes a dual connection over the packet-switched network if such a network address is received. When receiving a call, the instrument can terminate the call connection over the circuit-switched network and continue the call by way of the packet-switched network.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.