Method and apparatus for tapping control in an electronic switching system
US5930335A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 21, 1997 |
| Grant date | Jul 27, 1999 |
| Priority date | — |
| Expiry date | Aug 21, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M3/36
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method for use in an electronic switching system having more than one operator position system connected thereto, is used for wiretapping in order to determine a time length of a telephone call between a caller and a receiver. The method comprises the steps of: (a) measuring an elapsed time from the instant the caller is connected to the receiver; (b) checking if the elapsed time reaches a preset time; (c) wiretapping when the elapsed time reaches the preset time; (d) resetting the elapsed time and going back to step (a) if the caller is determined to be still on the line by the wiretapping; and (e) releasing the connection between the caller and the receiver if the caller is determined not to be on the line any longer by the wiretapping.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.