Professional Mobile Radio (PMR)

Professional Mobile RadioA Mobile Radio is a two-way radio designed to be installed in a vehicle. It normally uses the vehicle's power supply and an external antenna to provide reliable communication while travelling or working in the field. (PMR) is a term used to describe private radio communication systems designed for professional and business users. PMR systems provide organisations with dedicated or managed two-way radio communications for operational, safety and coordination purposes.

Professional Mobile Radio can include both analogue and digital radio technologies, ranging from relatively simple conventional systems to large, multi-site networks with features such as group calling, individual calling, GPS, encryptionEncryption protects two-way radio communications by converting voice or data into a secure form that can only be understood by authorised radios with the correct encryption capability and keys. and centralised dispatch.

What is Professional Mobile Radio?

Professional Mobile Radio is a broad term for radio systems designed specifically for professional users rather than consumer applications.

PMR systems are commonly used by organisations that need reliable, immediate communication between employees or teams.

Typical users include:

• Security companies
• Construction businesses
• Transport operators
• Utilities
• Manufacturing
• Hospitality
• Agriculture
• Event organisers
• Facilities management
• Emergency and public-safety organisations

Professional Mobile Radio vs consumer radio

Consumer radios are generally designed for simple, short-range communication.

Professional Mobile Radio systems can provide a much wider range of capabilities, including:

• Managed radio channels
• Group calling
• Individual calling
• Emergency functions
• Repeaters
• Dispatch
• GPS
• Encryption
• Data services
• Multi-site networking

The complexity of the system depends on the organisation’s requirements.

PMR and two-way radio

PMR systems use two-way radios to provide communication between users.

A basic system may consist of:

Portable Radios ↔ Portable Radios

A larger system may include:

Portable Radios → RepeaterA Repeater receives a two-way radio transmission and retransmits it, usually from an elevated location, to extend the coverage and reliability of a radio communication system. → Radio NetworkA Network is a connected system of radios, equipment and infrastructure that allows users to communicate across a defined area. Radio networks can range from simple radio-to-radio systems to large multi-site networks. → Dispatch

This allows the system to be designed around the required coverageRadio Coverage is the geographical area in which a two-way radio system can provide reliable communication. Coverage depends on the radios, antennas, frequency, terrain, buildings and system infrastructure. and operational needs.

Portable radios in PMR systems

Portable Radios are commonly used by individual workers.

They allow users to communicate while moving around a site or working away from a fixed location.

Portable radios can be supplied with accessories such as:

• Earpieces
• Headsets
• Speaker microphones
• Spare batteries
• Charging docks

Mobile radios in PMR systems

Mobile Radios are designed to be installed in vehicles.

They can provide communication for:

• Drivers
• Engineers
• Security vehicles
• Agricultural machinery
• Service vehicles
• Transport fleets

Vehicle-mounted antennas and access to the vehicle’s electrical system can provide advantages over handheld equipment.

Base stations in PMR systems

A Base StationA base station is a fixed two-way radio installed at a permanent location, allowing an operator to communicate with handheld or mobile radios across a site or operating area. is a radio installation located at a fixed position.

Base stations can be used in:

• Control rooms
• Offices
• Depots
• Security centres
• Dispatch rooms

They can provide a central communication point for radio users.

PMR and repeaters

A Repeater receives a radio transmissionTransmission is the process of sending voice, data or signalling from a radio using a radio-frequency signal to another radio, repeater or communication system. and retransmits it, allowing communication over a greater area.

A typical PMR system might use:

Portable RadioA Portable Radio is a battery-powered two-way radio designed to be carried and operated by an individual, providing mobile communication for professional and operational users. → Repeater → Portable Radio

Repeaters can be particularly useful where users need coverage across:

• Large sites
• BuildingsAn antenna transmits and receives radio-frequency signals, allowing a two-way radio to communicate. Antenna type, frequency, height and location can all affect radio performance and coverage.
• Farms
• Industrial facilities
• Event venues
• Multiple locations

PMR and coverage

Coverage is an important part of Professional Mobile Radio systemA Radio System is a complete communication solution comprising two-way radios and, where required, equipment such as repeaters, antennas, base stations, mobile radios and network infrastructure. design.

Coverage can be affected by:

• FrequencyAn antenna transmits and receives radio-frequency signals, allowing a two-way radio to communicate. Antenna type, frequency, height and location can all affect radio performance and coverage.
• Transmitter powerAn antenna transmits and receives radio-frequency signals, allowing a two-way radio to communicate. Antenna type, frequency, height and location can all affect radio performance and coverage.
• AntennaAn antenna transmits and receives radio-frequency signals, allowing a two-way radio to communicate. Antenna type, frequency, height and location can all affect radio performance and coverage. height
• Terrain
• Buildings
• Vegetation
• InterferenceRadio interference occurs when unwanted radio-frequency signals or electrical noise disrupt two-way radio communications, causing distorted audio, broken transmissions, reduced coverage or loss of communication.
• Repeater location

A professional PMR system should therefore be designed around the actual environment in which it will operate.

PMR and analogue radio

Analogue PMR systems have been widely used for professional communication for many years.

They can provide straightforward voice communication and can be relatively simple to operate.

Analogue systems may still be appropriate for some applications, particularly where advanced digital features are not required.

PMR and digital radio

Digital PMR systems convert voice into digital information before transmission.

Digital systems can provide additional functionality such as:

• Group calling
• Individual calling
• Text messaging
• GPS
• Encryption
• Emergency signalling
• Data communication

The exact capabilities depend on the radio technology.

PMR and DMR

Digital Mobile Radio (DMR)Digital Mobile Radio (DMR) is an ETSI digital radio standard for professional two-way communications, supporting voice, group calling, data and other features on compatible radio systems. is one of the major digital radio standards used in professional radio systems.

DMR can support different levels of system complexity, from relatively simple conventional radio systems to large networked installations.

Professional DMR systems can provide features including:

• Individual calls
• Group calls
• Emergency alerts
• GPS
• Text messaging
• Encryption
• Repeaters
• Dispatch

PMR and TETRA

TETRA (Terrestrial Trunked Radio) is another professional digital radio technology.

TETRA is designed for professional and mission-critical communications and can support sophisticated network and group-communication functions.

It is commonly associated with large-scale public-safety and critical communications applications.

PMR and trunked radio

A Trunked Radio system uses shared radio resources and dynamically allocates communication capacity between users.

This can make efficient use of available frequencies when many users or groups need to communicate.

Trunked PMR systems can support:

• Group calls
• Individual calls
• Priority calls
• Emergency calls
• Dispatch
• Multiple sites

PMR and conventional radio

A conventional PMR system generally assigns users to defined channels.

For example:

ChannelA two-way radio channel is a programmed set of communication settings, typically including frequency and signalling, that allows compatible radios to communicate with one another. 1 → Operations

Channel 2 → Security

Channel 3 → Maintenance

This can provide a straightforward communication system without the complexity of a large trunked network.

PMR and group calling

Group calling allows a user to communicate with several members of a team simultaneously.

For example:

Supervisor → Operations Team

This is one of the main advantages of professional radio communication.

PMR and private calling

Private CallPrivate Call is a two-way radio feature that allows one radio user to communicate directly with another individual radio user rather than making the conversation part of a general group call. allows one radio user to communicate with another individual radio user.

This can be useful when a supervisor, dispatcher or worker needs to communicate with one person without involving an entire group.

PMR and priority calls

A Priority CallPriority Call is a two-way radio feature that gives important or authorised communications higher priority than routine radio traffic, helping urgent messages access the system when channels are busy. can give important communications preferential treatment when the radio system is busy.

This can be particularly useful for control rooms, supervisors and operational teams.

The exact priority and pre-emption capabilities depend on the radio system.

PMR and emergency communication

Professional PMR systems can provide dedicated emergency functions.

Depending on the equipment, these may include:

• Emergency ButtonAn Emergency Button is a dedicated two-way radio control that allows users to quickly send an emergency alert to a dispatcher, control room or authorised radio users.
• Emergency AlarmAn Emergency Alarm allows a two-way radio user to quickly alert a dispatcher, control room or other authorised users that assistance may be required.
• Emergency CallAn Emergency Call is a priority two-way radio function that allows a user to quickly request assistance and, on supported systems, establish an urgent voice communication with a dispatcher or control room.
• Man DownMan Down is a safety feature on some professional two-way radios that can detect a possible fall or unusual radio position and automatically raise an alert if the user does not respond.
• Lone WorkerA Lone Worker is someone who works without direct supervision or immediate assistance nearby. Compatible two-way radios can provide safety features such as timed check-ins, emergency alerts and GPS location.

These functions can alert a control room or designated radio group when assistance is required.

PMR and lone worker protection

A PMR system can support Lone Worker applications.

A lone worker carrying a compatible radio may be able to raise an emergency alert if they require assistance.

Some systems can also automatically generate alerts based on configured conditions.

PMR and Man Down

Man Down functionality can detect a potential fall or prolonged lack of movement.

Where supported, the radio can automatically generate an alert.

This can form part of a wider worker-safety system.

PMR and GPS

Professional digital PMR systems can incorporate GPS (Global Positioning System)GPS is a satellite-based positioning system that allows compatible two-way radios to determine their location. GPS data can support tracking, dispatch, fleet management and Geo-Fencing. functionality.

This can allow compatible radios to report their location to a dispatcher or management platform.

GPS can be useful for:

• Field workers
• Security teams
• Transport
• Utilities
• Large sites
• Mobile workforces

PMR and encryption

Professional PMR systems can support Encryption to protect radio communications.

Encryption can help prevent unauthorised parties from understanding protected communications.

The available encryption methods depend on the radio technology, equipment and system configuration.

PMR and end-to-end encryption

Some professional communication systems can support End-to-End EncryptionEnd-to-End Encryption protects radio communications between authorised endpoints, keeping voice or data encrypted through the network until it reaches the intended receiving device. (E2EE).

E2EE is a security architecture designed to protect communications between authorised endpoints.

It is distinct from ordinary radio encryption and should be evaluated according to the security requirements of the organisation.

PMR and dispatch

Dispatch systems provide a central point from which radio communications can be coordinated.

A dispatcher may be able to:

• Call individual radios
• Contact groups
• Send alerts
• Monitor communications
• Receive emergency notifications
• View GPS locations
• Manage incidents

This can be particularly valuable for larger PMR systems.

PMR and incident management

PMR can form part of an Incident ManagementIncident Management is the process of coordinating people, communications and resources during an incident. Two-way radios can provide rapid communication between teams, control rooms and responders. system.

For example:

Incident → Dispatch → Radio Alert → Response Team

This allows radio communications to form part of a wider operational response.

PMR and fleet management

Transport and logistics organisations can integrate PMR with Fleet ManagementFleet Management is the process of managing a two-way radio fleet, including equipment, users, programming, maintenance, firmware, security and radio system configuration. systems.

This can allow control rooms to communicate with drivers and, where supported, view vehicle or radio locations.

PMR and job tracking

Field-service organisations can combine professional radio systems with Job TrackingJob Tracking is the process of monitoring the progress, status and, where supported, location of a job or field worker from assignment through to completion, often using GPS, radio and dispatch systems..

A worker can be contacted by radio while carrying out an assigned task.

In more advanced systems, job information and radio communication can be integrated into the same operational workflow.

PMR and cloud management

Modern PMR systems can incorporate Cloud ManagementCloud Management uses an online platform to remotely manage and monitor compatible two-way radios, users, devices and communication settings from a central location. platforms.

Cloud-based systems can provide centralised administration and management of compatible radios and communication services.

Depending on the platform, administrators may be able to manage:

• Users
• Radio configurations
• Groups
• Devices
• Locations
• Communication services

PMR and OTAP

Compatible systems can support Over-the-Air Programming (OTAP)Over-the-Air Programming (OTAP) allows compatible two-way radios to be configured or updated remotely through a radio network, reducing the need to physically connect each radio to a programming computer..

OTAP allows authorised administrators to remotely update certain radio configurations through the communication network.

This can be particularly useful when managing large radio fleets across multiple sites.

PMR and OTAR

Encrypted PMR systems may support Over-the-Air Rekeying (OTAR)Over-the-Air Rekeying (OTAR) allows encryption keys on compatible two-way radios to be changed or updated remotely through a radio network, without physically connecting each radio for rekeying..

OTAR allows authorised encryption keys to be changed or distributed remotely on compatible equipment.

This can simplify key management for larger secure radio networks.

PMR and interoperability

InteroperabilityInteroperability is the ability of different communication systems, devices or organisations to work together and exchange information. In two-way radio, it can connect different radio networks, technologies or users through compatible systems or gateways. allows different communication systems or organisations to work together.

Professional PMR systems can potentially be integrated with:

• Other radio networks
• Dispatch systems
• Telephone systems
• Cellular networks
• Cloud platforms
• Data applications

The level of interoperability depends on the technologies and interfaces being used.

PMR and licensing

Professional Mobile Radio systems can operate under licensed or licence-exempt arrangements, depending on the service and equipment.

In the UK, professional licensed radioA Licensed Radio is a two-way radio operated under an appropriate radio licence. Licensed systems can provide greater control over frequencies, coverage and infrastructure than licence-free radio services such as PMR446. systems commonly operate under an Ofcom Business Radio LicenceAn Ofcom Business Radio Licence authorises businesses and organisations in the UK to use specified radio frequencies for professional two-way radio communication, subject to the licence conditions..

The applicable licence determines the authorised operating conditions.

PMR and PMR446

The abbreviation PMR should not be confused with PMR446.

Professional Mobile Radio (PMR) is a broad term for professional radio systems.

PMR446 is a specific licence-free radioA Licence-Free Radio is a two-way radio that can be used without an individual radio licence when it complies with the applicable licence-exempt rules. In the UK, PMR446 is the main licence-free radio service. service operating within designated frequencies and subject to defined technical restrictions.

PMR446 equipment is therefore not simply another name for Professional Mobile Radio.

PMR and licence-free radio

Licence-free radios can be suitable for straightforward short-range communication where the application does not require a licensed professional system.

Professional PMR systems can provide greater control, coverage and functionality where those capabilities are required.

PMR and Ofcom

In the UK, OfcomOfcom (Office of Communications) is the UK's communications regulator. For two-way radio users, Ofcom manages and regulates access to radio spectrum and the use of radio frequencies in the UK. regulates the use of radio spectrumSpectrum is the range of radio frequencies used for wireless communication. Two-way radios operate within specific parts of the radio spectrum, subject to frequency allocation and licensing requirements..

Organisations using licensed PMR systems must comply with the relevant licence conditions and technical requirements.

This includes using the authorised frequencies and operating parameters.

PMR and frequency

Professional PMR systems can operate across different frequencyFrequency is the number of cycles a radio wave completes each second, measured in Hertz. In two-way radio, frequency determines where a transmission operates within the radio spectrum. bands depending on the radio service and licence.

The choice of frequency can affect:

• Coverage
• Building penetration
• Antenna requirements
• System design
• Available channels

Frequency selection should therefore form part of the overall system assessment.

PMR and power output

Power OutputPower Output is the amount of radio-frequency energy produced by a two-way radio's transmitter, normally measured in watts. It is one factor affecting coverage, alongside frequency, antenna, terrain and other conditions. is another factor affecting radio coverage.

However, increasing transmitter power is not necessarily the best way to improve a PMR system.

A combination of suitable frequencies, antennas, repeater locations and network design can provide a more effective solution.

PMR and interference

Radio systems can be affected by Interference from other transmitters, electrical equipment and environmental sources.

Professional PMR systems should be planned to minimise interference and provide reliable communication.

PMR and dead spots

A Dead SpotA Dead Spot is an area where two-way radio communication is weak, unreliable or unavailable. Dead spots can be caused by buildings, terrain, distance, interference or inadequate radio coverage. is an area where radio communication is unavailable or unreliable.

Professional PMR systems can use repeaters, antennas and additional infrastructureRadio infrastructure is the equipment and supporting systems behind a professional two-way radio network, including repeaters, antennas, base stations, network connections, power systems and dispatch equipment. to address coverage problems.

A Site SurveyA Site Survey is an assessment of a location to determine whether a two-way radio system will provide the required coverage, reliability and performance. can help identify dead spots before a system is deployed.

PMR for construction

Construction companies use professional radio systems to coordinate:

• Site managers
• Supervisors
• Plant operators
• Ground workers
• Security
• Contractors

Repeaters can provide coverage across large or complex sites.

PMR for events

Events can require communication between:

• Event management
• Security
• Stewards
• Medical teams
• Production
• Site operations

PMR systems can provide dedicated operational communication without relying entirely on mobile-phone networks.

PMR for security

Security organisations can use PMR systems for rapid communication between officers, supervisors and control rooms.

Features such as private calls, group calls, emergency alerts and GPS can support more sophisticated security operations.

PMR for transport

Transport operators can use PMR to connect:

• Drivers
• Control rooms
• Depot staff
• Supervisors
• Maintenance teams

A network can combine portable and mobile radios as required.

PMR for agriculture

Professional radio systems can provide communication across farms, fields, buildings and vehicles.

Where direct radio coverage is insufficient, a repeater can provide wider coverage.

PMR for hospitality

Hotels, venues and other hospitality businesses can use PMR systems to coordinate staff across buildings and operational areas.

Portable radios can be used by:

• Management
• Security
• Housekeeping
• Maintenance
• Front-of-house teams
• Event staff

PMR for utilities

Utilities and infrastructure organisations often require communication between mobile workers and control centres.

Professional PMR can provide operational communication across large geographical areas where the system is designed appropriately.

PMR and radio hire

Professional Mobile Radio equipment can be supplied as part of Radio HireRadio Hire is the temporary rental of two-way radios and related communication equipment for events, projects and operational requirements, providing professional communication without purchasing the equipment. services.

Temporary PMR systems can be used for:

• Events
• Construction projects
• Security operations
• Film production
• Hospitality
• Temporary sites

The supplied equipment can be configured according to the requirements of the operation.

PMR and system scalability

Professional radio systems can range from a few radios communicating on a single channel to large multi-site networks.

This allows organisations to select a system appropriate to their size and operational requirements.

A larger system may include:

Portable Radios + Mobile Radios + Repeaters + Base Stations + Dispatch + Network Infrastructure

PMR and DCS

DCS provides professional two-way radio systems for businesses and organisations across the UK.

We can help determine whether a conventional, digital, repeater-based or networked PMR solution is appropriate for your operation, including radio hire and larger multi-site communication systems.

The right PMR solution depends on the required coverage, number of users, working environment, features, licensing requirements and budget.