REVERSE 911 USING MULTICAST SESSION INTERNET PROTOCOL (SIP) CONFERENCING OF VOICE OVER INTERNET PROTOCOL (VoIP) USERS

Patent metadata

Field	Value
Publication number	US-2016277589-A1
Application number	US-201615167249-A
Country	US
Kind code	A1
Filing date	May 27, 2016
Priority date	Dec 14, 2007
Publication date	Sep 22, 2016
Grant date	—

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.

First claim

What is claimed is:

1 . A reverse 911 emergency alert system, comprising:
a SIP conference focus server to establish a SIP conference triggered by an appropriate reverse 911 trigger event; and a Session Internet Protocol (SIP) conference bridge, initiated by said SIP conference focus server, to establish a listen-only SIP conference with said SIP conference focus server as host; wherein said SIP conference focus server is adapted to issue a SIP INVITE to each of a plurality of user agent devices designated in a user agent database for listen-only participation in said listen-only SIP conference; wherein said SIP conference focus server further establishes another listen-only SIP conference triggered by said appropriate reverse 911 trigger event, and issues a SIP INVITE to each of a plurality of user agent devices designated in said user agent database for listen-only participation in said another listen-only SIP conference; wherein said SIP conference focus server cascades said listen-only SIP conference with said another listen-only SIP conference; and wherein said plurality of user agent devices are provided listen-only access to said SIP conference bridge.

Assignees

• Telecomm Systems Inc

Inventors

• Morin Drew

Classifications

• H04L65/1006

  Electricity · mapped topic

• H04M3/5116

  for emergency applications · CPC title

• H04M11/04 Primary

  with alarm systems, e.g. fire, police or burglar alarm systems · CPC title

• H04M2242/04

  for emergency applications · CPC title

• H04L65/403

  Arrangements for multi-party communication, e.g. for conferences (data switching systems for conference H04L12/18; arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities H04M3/56; television conferencing systems H04N7/15) · CPC title