Wireless, All-IP, TDM, PSTN

Testing Emergency Call Services: 911, Enhanced 911 (E-911) & NG-911

Emergency Services 911

Emergency services are the backbone of a civilized society. Police, fire, and ambulance are contacted by a single emergency telephone number. In the US that single number is 911. In other countries, there may be a different unique number or several numbers. In the European Union, the number is 112, in others 999, and so on. A person at a Public Service Access Point, or PSAP, usually a governmental agency/service close to the location of the emergency answers the call and dispatches 1st Responders as required. PSTN, VoIP, and Wireless carriers have developed methods for voice connection to the right PSAP and to provide accurate location data necessary for dispatch.

GL's Test Solutions

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

Though carriers are rapidly transitioning to IP and Wireless infrastructure from Legacy, PSAPs will be last to convert from Legacy to NG. 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 solution 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 MAPS™ CAS Emulator and MAPS™ FXO FXS Emulator. It also supports analyze/monitor an analog CAMA trunk for 911 calls, generate CDRs, get precise protocol exchange:

  • Generate/Receive 911 Emergency CAMA calls over T1 – in bulk, and continue indefinitely
  • Be 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

For complete details on the test requirement and the offered test solution, refer to CAMA webpage

NG9-1-1 Call Simulation using SIP/RTP and Instant Messaging using SIP/MSRP

With the evolution of NG9-1-1 technology, end-users are enabled not only to access 911 services through voice calls, but also permit text-to-911, images, video and data to PSAPs.
MAPS™ SIP emulator for Emergency Services Internet Protocol Networks (ESInets) 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.

MAPS™ SIP allows SIP vendors, wireless carriers, NG9-1-1service providers, and emergency communications centers to test IP applications for satisfactory working of NG9-1-1 services prior to deployment.

  • Test NG-PSAP(s) for Voice calls, SMS and Instant Messaging
  • Test solution to simulate SIP+MSRP endpoints, establish the connected sessions, and record related transport statistics on the MSRP text flows as part of the results
  • Testing call performance based on different voice codec, narrowband and wideband codec
  • Scripts to perform advanced tests using SIP methods like SUBSCRIBE/NOTIFY, REFER and INFO for testing NG 911 interfaces.
  • API Integration for automated testing
  • Test advanced voice features such as interactive voice response (IVR), conferencing

For complete details on the test requirement and the offered test solution, refer to MAPS™ SIP MSRP webpage.

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

The Wireless Drive-Test solution includes GL's VQuad™ with Dual UTA HD supporting call control of variety of mobile device networks – from 2G to 4G LTE and 5G, including the capability of sending/recording voice, testing video conferencing, and testing a variety of data over the mobile devices, while analyzing their performance.

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.

For complete details on Voice, and Data drive testing solutions, refer to Drive Testing for Voice, Data Quality webpage

Monitoring Emergency Services Network with web-based NetSurveyorWeb™

GL offers various network monitoring solutions to monitor traditional 9-1-1, E9-1-1, as well as NG9-1-1 networks for analyzing the performance of signaling and traffic. various measurement and reporting tools are provided to facilitate in-depth troubleshooting.

NetSurveyorWeb™ software is a core network monitoring solution for wide range of protocols and is based on an open three tier distributed architecture driven by non-intrusive hardware or software probes, intelligent software, and a database engine.

For complete details on monitoring emergency services, refer to NetSurveyorWeb™ webpage.


Testing Emergency Call Services 911 and Enhanced-911

Loopback CAMA Simulation PSAP

Loopback CAMA Simulation PSAP

FXO CAMA Monitoring Setup

FXO CAMA Monitoring Setup

CAMA FXO FXS Bulk Call Setup Using Channel Bank

CAMA FXO FXS Bulk Call Setup Using Channel Bank

FXO FXS CAMA loopback Simulation Setup

FXO FXS CAMA loopback Simulation Setup