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44 results about "Emergency telephone number" patented technology

In many countries the public switched telephone network has a single emergency telephone number (sometimes known as the universal emergency telephone number or the emergency services number) that allows a caller to contact local emergency services for assistance. The emergency number differs from country to country; it is typically a three-digit number so that it can be easily remembered and dialed quickly. Some countries have a different emergency number for each of the different emergency services; these often differ only by the last digit. See List of emergency telephone numbers.

Emergency phone with alternate number calling capability

An emergency-use-only cellular phone provides for contacting and establishing full-duplex voice communication with emergency personnel at either a public emergency response service or a private roadside assistance service. The phone automatically places a cellular call to the public emergency response service with a single press of a first activation button, and to the private roadside assistance service with a single press of a second activation button. When either activation button is pressed, the following functions are initiated: (1) electrical power from a power supply is provided to a cellular transmitter and receiver, (2) the cellular receiver is activated to search for an available channel from among A or B cellular system channels, (3) an emergency telephone number corresponding to the selected service is accessed from memory, and (4) the cellular transmitter is activated to establish communication with the selected emergency response service. Since all of these functions are initiated by pressing one button, communication with the selected emergency response service may be established simply and speedily, even under stressful conditions. The phone may include a modular GPS receiver unit for providing location information to the public emergency response service or a private roadside assistance service.
Owner:SECUREALERT INC

Network telephone gateway and emergency call processing method thereof

ActiveCN105338206AAvoid unsuccessful situationsEmergency calls are normalInterconnection arrangementsSpecial service for subscribersRecording durationUser needs
The invention discloses a network telephone gateway. The network telephone gateway comprises a determining module and a switching module. The determining module receives a telephone number a user needs to dial or answer and determines whether the telephone number is an emergency telephone number in an emergency call list. The switching module, in case that the telephone number is an emergency telephone number and a conversation network is an IP network, switches the conversation network into a public switched telephone network, realizes an emergency call through the public switched network, records duration of connection maintained with the public switched telephone network after the emergency call ends, and switches the conversation network into the IP network after the duration exceeds a preset time period. According to the network telephone gateway and the emergency call processing method thereof, provided by the invention, such situations can be avoided that the network telephone gateway fails to be switched to the public switched telephone network due to incapability of detection of a reply call of the public switched telephone network and the like, and it is ensured that the reply network call of the public switched telephone network can be normally answered.
Owner:AMBIT MICROSYSTEMS (SHANGHAI) LTD
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