System for interception and transmission of communication signals on telephone and data lines
US5590182A · kind A · utility
13Cited by
11References
60Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 22, 1994 |
| Grant date | Dec 31, 1996 |
| Priority date | — |
| Expiry date | Jun 22, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M1/27
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A control device may be connected in series or in parallel to a telephone for restricting or routing calls made from the telephone to take advantage of low cost carriers for intra-LATA calls. The serial or parallel connection of the telephone can be detected as well. The device may be programmed for routing depending on the geographical location of the telephone. The central receiving office of the local phone company can be prevented from routing the call by the use of interfering tones.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.