Reverse 911 using multicast session internet protocol (SIP) conferencing of voice over internet protocol (VoIP) users

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United States of America Patent

PATENT NO 9369294
APP PUB NO 20090154659A1
SERIAL NO

12292719

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Abstract

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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.

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Patent Owner(s)

  • TELECOMMUNICATION SYSTEMS, INC.

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Morin, Drew Davidsonville, US 15 765

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