Method and apparatus for selecting a preferred service provider during a call setup in a public cordless telephone system
US5371782A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 2, 1991 |
| Grant date | Dec 6, 1994 |
| Priority date | — |
| Expiry date | May 2, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W76/10
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In a public cordless telephone system, a cordless telephone handset unit requests and establishes a communications link with a public base unit served by a desired local service provider whenever possible. By generating a service request containing a specific carrier request code, the handset unit selectively identifies an available public base unit served by the desired local service provider and then establishes a communications link with this base unit. In response to receiving the service request from the handset unit, all public base units operated by the chosen service provider respond by providing a first acknowledgment signal. All other public base units respond by providing a second acknowledgment signal. When both such signals are received, the handset unit responds only to the first acknowledgment signal and establishes a communications link with the first base unit providing this signal. When only the second acknowledgment signal is received, the handset unit responds by establishing a communications link with the first base unit providing this second acknowledgment signal. When communications is established with a base unit providing the second acknowledgment signal, a…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.