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Telecom Business Review | Tuesday, October 25, 2022
LMR systems generally consist of handheld portable radios, mobile radios, base stations, a network, and repeaters.
FREMONT, CA: LMR systems are terrestrially-based wireless communications systems commonly used by federal, state, local, tribal, and territorial emergency responders, public works companies, and even the military to support voice and low-speed data communications.
LMR systems generally consist of handheld portable radios, mobile radios, base stations, a network, and repeaters.
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• Handheld portable radios are conducted by public safety personnel and tend to have a restricted transmission range.
• Mobile radios are usually located in vehicles and use the vehicle’s power supply and a larger antenna, providing a greater transmission range than handheld portable radios.
• Base station radios, such as public safety answering points or dispatch centers, are located in fixed positions and tend to have the most powerful transmitters.
• A network is necessary to connect the different base stations to the same communications system.
• Repeaters enhance the effective communications range of mobile portable and base station radios by retransmitting received radio signals.
WHY ARE LMR SYSTEMS IMPORTANT?
LMR systems are the principal means of voice communication among public safety staff. LMR systems are designed to satisfy the unique requirements of public safety and deliver secure, reliable, mission-critical voice communications in various environments, scenarios, and emergencies.
LMR technologies have been employed by public safety personnel for many years and give the most reliable means of voice communications for public safety at this time. LMR technologies have been improved to provide mission-critical features. LMR technology has progressed from conventional, analog voice service to complex systems incorporating digital and trunking features, such as rapid voice call setup, group calling capabilities, high-quality audio, and guaranteed priority access to the end-user. These enhancements have enhanced the interoperability, spectral efficiency, security, reliability, and functionality of voice and low-speed data communications for public safety personnel.
Public safety agencies are prepared and skilled in the use of LMR technologies. LMR technologies and characteristics have been integrated into response protocols and training curricula and tested through planned exercises and real-world events.
While new technologies are entering the market daily, emergency responders are familiar with how LMR technologies work. Responders have been trained and have used LMR technologies in various settings for years. This knowledge has helped public safety agencies plan for various scenarios and executes effective response operations.
Individual states, localities, and regions have also dedicated public funding to communication systems. Agencies and jurisdictions have cooperated to leverage present infrastructure, connect LMR systems, and create networks of communications systems. State, local, tribal, and territorial governments continually upgrade these systems to improve interoperability, capabilities, coverage, and capacity. These systems are in place and working.
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