Automatic dialer
US4873720A · kind A · utility
12Cited by
2References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 23, 1988 |
| Grant date | Oct 10, 1989 |
| Priority date | — |
| Expiry date | Mar 23, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M1/27485
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An automatic dialer, which generates a signal for selection of a communication line from a plurality of communication lines belonging to a plurality of common carriers before communication is made between a calling subscriber and a called subscriber. The automatic dialer automatically transmits a signal specifying one of a plurality of signal paths coupled to the called subscriber in addition to other necessary signals, thus minimizing the numbers dialed by a user and resulting in easier operation of the system. The ones of the plurality of signal paths specified by the system can be easily changed by a tone sent to the system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.