Remote reprogramming system for telephone call forwarding service
US4768221A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 20, 1986 |
| Grant date | Aug 30, 1988 |
| Priority date | — |
| Expiry date | Oct 20, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M3/54
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A device for remotely controlling call forwarding for a given telephone line. The device includes a detection circuit for detecting an incoming call to the given telephone line. If it detects only one or two signals indicating a previous call forwarding initiate setting, it automatically terminates call forwarding and awaits input of a new call forwarding telephone number followed by a security code. If it detects more than four rings, it knows that the call forwarding was not enabled and it is ready to accept the new call forwarding number remotely input along with the security code. After receiving successfully the remotely inserted call forwarding number and security code, it proceeds to reprogram the system with the new call forwarding number. Should any unauthorized user be using the system, it will reprogram with the previously stored call forwarding number.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.