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GL Comms Testing Emergency Services: 911, Enhanced 911 (E-911) & NG-911
January 27, 2020

GL Communications offers testing tools for Legacy 911, E911 and NG-911 emergency services. GL’s tools can generate and analyze analog and Voice over IP calls and instant messages.

GL's Test Solutions

Test Legacy 911 and E911 Emergency Services Over PSTN (Using CAMA, Analog, CAS, and FGD-OS)

Many emergency services still rely on legacy technologies for voice communications. In 2-wire legacy circuits, Centralized Automatic Message Accounting (CAMA) trunk connects a carrier switch directly to the Selective Router (SR), a special 911 Switch that in turn connects to many PSAPs (Public Safety Access Points). PSAPs are call centers where agents answer emergency calls and dispatch police, firefighters, and ambulances.

GL's versatile tProbe™ (or any of our T1 E1 rack mount solutions) can emulate and analyze legacy 911 emergency calls and their 911 elements (PSAP, 911 Selective Router). Both analog and digital (T1) CAMA simulations are supported using GL’s CAS Emulator and FXO FXS Emulator. GL’s solution can also analyze and monitor analog CAMA trunk for 911 calls, generate call detail records (CDR) and get precise protocol exchange:

  • Generate/Receive 911 Emergency CAMA calls over T1 – in bulk, and continue indefinitely
  • Emulate the 911 Selective Router or the PSAP end – or both simultaneously
  • Generate 911 Emergency CAMA calls over analog FXO or FXS, and continue indefinitely
  • Follow the CAMA protocol precisely - MF signaling for "calling #"
  • Analyze/monitor T1 CAMA trunks for 911 calls, generate CDRs, get precise protocol exchange

NG-911 Call Simulation using SIP/RTP and Instant Messaging using SIP/MSRP

With the evolution of NG-911 technology, end-users can pass text, video and data along with voice to PSAPs. GL’s SIP emulator for Emergency Services Internet Protocol Networks (ESINet) enable call delivery using Session Internet Protocol (SIP), as well as Instant Messaging (IM) delivery conforming with RFC 4975/4976 - Message Session Relay Protocol (MSRP) protocol.

GL’s solution, known as MAPS™ SIP, allows SIP vendors, wireless carriers, NG-911 service providers, and emergency communications centers to test IP applications for satisfactory NG-911 service performance prior to deployment.

  • Test NG-PSAP(s) for Voice calls, SMS and Instant Messaging
  • Simulate SIP+MSRP endpoints, establish connections, and record related transport statistics on the MSRP text flows
  • Test call performance based on different voice codecs
  • Use SIP methods like SUBSCRIBE/NOTIFY, REFER and INFO for testing NG-911 interfaces
  • API Integration for automated testing via scripts
  • Test advanced voice features such as interactive voice response and conferencing

Drive Test Voice, and Data Services for Quality (Emergency services)

GL offers solutions for determining voice quality as a function of location (drive testing) and can support call control on a variety of mobile device networks – from 2G to 4G LTE and 5G, including the capability to send/record voice, test video conferencing, and test data throughput and other metrics.

A GPS option permits time synchronization between two geographically separated systems as well as location information for drive testing. With an added wireless network connection, all functionality can be remotely controlled, and all results transmitted to remote locations can be accessed on-the-go. You can simply load configurations and start/stop the tests, grab test results and stream files to the command center locations.

Monitor voice calls over the Emergency Services Network

GL offers various network monitoring solutions for traditional 9-1-1, E9-1-1, as well as NG-911 networks.  Calls can be captured and analysed using various metrics such as mean opinion score, R factor, call connections, drops and failures, spectral displays, etc. These tools can aid operators to identify poor network performance and can facilitate troubleshooting. Thousands of simultaneous calls can be monitored.

For complete details on the test requirements and the offered test solutions, refer to 911-public-safety-network-test-solution webpage.




March 2023

27 - 30
International Wireless Communications Expo (IWCE) 2023
Las Vegas

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