Telephone network access device
US9363385B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Aug 4, 2014 |
| Grant date | Jun 7, 2016 |
| Priority date | — |
| Expiry date | Sep 11, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q2213/13399
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A telephone network access device switchable between a VOIP service and a PSTN service includes an RJ-11 port, a voice splitter, a first relay, a second relay, a SLIC chip, a CPU, and a ring detection unit. The ring detection unit outputs a first switch signal in response to detecting a ring signal of a PSTN communication. The second relay connects the telephone to the VOIP network in response to a power on event. The CPU controls the first relay and the second relay to connect the telephone to the PSTN network in response to the CPU receiving the first switch signal, and controls the second relay to reconnect the telephone to the VOIP network when the PSTN communication ends.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.