Voice band-based data transmission system
US6028892A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 15, 1996 |
| Grant date | Feb 22, 2000 |
| Priority date | — |
| Expiry date | Aug 15, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W92/18
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A radiotelephone system provides a voice channel for carrying voice signals between a mobile unit and a called or calling unit. A first modem in the mobile unit and a second modem connected to a point along the voice channel employ a "blank-and-burst" method of communication to provide a data channel between a first data device connected to the mobile unit and a second data device connected to the second modem. The data channel enables the data devices to communicate with each other seemingly concurrently, and with minimal interference, with the voice signals that are being carried over the voice channel and without requiring modifications to any base station.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.