Packet network telephone interface system for POTS
US6711160B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 31, 1998 |
| Grant date | Mar 23, 2004 |
| Priority date | — |
| Expiry date | Mar 31, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S379/90
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The packet network phone unit is an interface between a telephone instrument and a packet network for enabling voice data to be communicated over the packet network. The unit also functions as a gateway between a packet network and a public switched telephone network, thereby interconnecting the networks and providing a public switched telephone network gateway to a packet network. When power is not supplied to the unit, a fallback switch automatically links the telephone instrument directly to the public switched network, bypassing the circuitry in the unit. The unit includes links to a plurality of external serial communications lines as well as an interface for connecting to a personal computer. The unit also includes an LCD driver and a display for displaying information such as a caller identification. The packet network phone unit also may function an answering machine/messaging system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.