Emergency Numbers & Services
Comprehensive guide to emergency calling systems in mobile networks, including global emergency numbers, location services, and technical implementation of emergency services in 3GPP systems.
Emergency Information
In a real emergency, always dial your local emergency number immediately. This page is for educational purposes about emergency systems.
Global Emergency Numbers
Unified European emergency number, works in all EU countries
Additional Numbers
Primary emergency number for US, Canada, and many Caribbean countries
Different numbers per country, some standardization efforts
Additional Numbers
ITU-T recommended global emergency number
Additional Numbers
Emergency Services
Automatic emergency calling system for vehicles
Standards
Features
- • Automatic crash detection
- • Manual emergency button
- • Vehicle location transmission
- • Voice communication with PSAP
- • Minimum Set of Data (MSD)
Emergency caller location determination
Standards
Features
- • Cell-ID based location
- • Enhanced Cell-ID (E-CID)
- • Assisted GPS (A-GPS)
- • WiFi positioning
- • Bluetooth beacons
Cell broadcast emergency alerts to mobile users
Standards
Features
- • Cell Broadcast Service (CBS)
- • Emergency Alert System (EAS)
- • Commercial Mobile Alert System (CMAS)
- • EU-Alert system
- • Earthquake and Tsunami Warning System (ETWS)
Priority network access for emergency services
Standards
Features
- • Emergency call priority
- • Multimedia Priority Service (MPS)
- • Wireless Priority Service (WPS)
- • Government Emergency Telecommunications Service (GETS)
- • Network congestion bypass
Emergency Number Dialed
User dials emergency number (112, 911, etc.)
UE recognizes emergency number and initiates emergency call procedure
Network Recognition
Network identifies call as emergency
Emergency indication in call setup, priority handling activated
Location Determination
Network determines caller location
LCS procedures activated, location information gathered
PSAP Routing
Call routed to appropriate Public Safety Answering Point
Emergency routing based on location and service type
Information Transfer
Location and caller information sent to PSAP
Emergency location information and callback number provided
Technical Requirements
- • Emergency call recognition without SIM
- • Priority access during network congestion
- • Location information provision
- • Callback capability maintenance
- • Multi-language support
- • Emergency number recognition
- • Location services capability
- • Emergency call indication
- • Audio/video emergency calls
- • Accessibility features
- • Local emergency number support
- • Location accuracy standards
- • Response time requirements
- • Accessibility compliance
- • Privacy protection