Pulse dialing system for VoIP modem
US6914978B2 · kind B2 · utility
6Cited by
2References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 16, 2002 |
| Grant date | Jul 5, 2005 |
| Priority date | — |
| Expiry date | Jan 17, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M1/2535
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A pulse dialing system for a VoIP modem includes a subscriber line interface circuit (SLIC) for interfacing analog telephone signals to digital signals, a relay for selectively connecting a telephone set with a public switched telephone network (PSTN) or with the SLIC, and a control means, coupled to the SLIC and to the relay, for receiving a digit of a dialed telephone number and for controlling the relay to connect the telephone set with the PSTN and with the SLIC alternatively for a number of cycle(s) equal to the digit of the dialed telephone number so as to generate pulse dialing signals to the PSTN.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.