Reverse 911 using multicast session internet protocol (SIP) conferencing of voice over internet protocol (VoIP) users
US9369294B2 · kind B2 · utility
2Cited by
182References
24Claims
0Family size
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Inventor
Key dates
| Filing date | Nov 25, 2008 |
| Grant date | Jun 14, 2016 |
| Priority date | — |
| Expiry date | Aug 8, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M2242/04
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A reverse 911 system uses voice over Internet Protocol (VoIP)/Session Internet Protocol (SIP) conferencing. An emergency alert message may be a text, video, MMS, hyperlink and/or image communicated simultaneously to multiple VoIP users via a SIP conference. Multiple SIP conferences may be cascaded to communicate with a larger number of users in a relevant group of users to be communicated with.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.