Secure cordless telephone extension system and method
US5911119A · kind A · utility
62Cited by
39References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 15, 1996 |
| Grant date | Jun 8, 1999 |
| Priority date | — |
| Expiry date | Oct 15, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B2203/5441
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method and system for multiple access telephone communications is described. The system utilizes one or more base units connected to subscriber lines, and multiple extension units in communication with each base unit via building power lines. Secure multiple access coding is used to prevent eavesdropping and interference. Extension units may employ cordless telephone technology. Caller ID information transmitted with incoming telephone signals may be transmitted to extension units via building power lines and displayed on the extension handset or cradle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.