Automatic call screening telecommunication device
US6101249A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 27, 1997 |
| Grant date | Aug 8, 2000 |
| Priority date | — |
| Expiry date | Aug 27, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M1/82
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A selective ring response device for a telecommunication line comprises: a ring tone detector circuit for detecting a special ring tone different from a standard ring tone, the ring tone detector circuit coupled to the communication line; an interface circuit capable of placing the communication line in an off-hook status and capable of selectively applying a switch hook flash signal to the communication line, the interface circuit coupled to the communication line; and a control circuit coupled to the ring tone detector circuit and the interface circuit, wherein the interface circuit places the communication line in the off-hook status, and at the user's request applies the flash hook signal to the communication line in response to the ring tone detector circuit detecting the special ring tone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.