Professional Mobile Radio Types and Standards

Professional mobile radio systems are designed to provide reliable and efficient communication for first responders, public safety personnel, and other professionals who require high-quality voice and data services.

These systems use a variety of radio types and standards to ensure seamless communication across different networks and environments.

Two of the most common types of professional mobile radios are trunked radios and conventional radios. Trunked radios use a network of channels to allocate frequencies dynamically, allowing for more efficient use of spectrum and greater capacity.

Conventional radios, on the other hand, use a fixed frequency assignment system, which can be more straightforward to implement but may not offer the same level of scalability and flexibility as trunked systems.

The Project 25 (P25) standard is a widely adopted digital radio standard for public safety communication, offering advanced features such as encryption, authentication, and priority dispatching.

P25 radios are designed to be interoperable with other P25 systems, allowing for communication between different agencies and jurisdictions.

Take a look at this: Public Mobile

Professional mobile radio is a type of radio communication system designed for public safety and commercial use.

It uses a standardized digital protocol to provide reliable and secure voice and data communication over a wide area.

This system is typically used by emergency responders, such as police, firefighters, and paramedics, to coordinate their response to emergencies.

It also supports features like group calls, individual calls, and emergency alerts.

Professional mobile radio systems are designed to be highly reliable and secure, with features like encryption and authentication to prevent unauthorized access.

For another approach, see: Advanced Mobile Phone System

Professional mobile radios offer several key features and benefits that make them ideal for mission-critical communication.

They can communicate one-to-many, allowing multiple radios to receive a call at the same time, which is different from the point-to-point communication of mobile phones.

The Push-To-Talk feature connects you and your teammates quickly, providing communication efficiency and helping you get work done quickly.

Explore further: Access Point Name

In mission-critical environments, such as frontline public safety, maintaining a secure, private network is paramount, and professional mobile radio systems require security mechanisms to provide end-to-end encryption.

The communication range of a single professional mobile radio is limited, but it can be increased by increasing the transmission power or raising the antenna, or by using repeaters to expand the range.

Professional mobile radio systems are mostly half-duplex, where multiple radios share a common radio channel, but you can set the priority call right, so that in an emergency, you can directly press the PTT button to forcibly interrupt the existing call and send an emergency message.

They usually use UHF or VHF frequency bands in different scenarios to obtain better communication quality.

Here are some key features of professional mobile radios:

PMR solves several known pain points, including the requirement for mission-critical communication site-wide and the inability to communicate discreetly during critical situations.

Consider reading: Node B

Professional Mobile Radio comes in different forms, each with its own unique characteristics. One type is Analogue Private Mobile Radio (PMR), which has been widely used in Europe for many years. It's available for both licensed and unlicensed spectrum use and can be used for a variety of purposes, from low-cost walkie-talkies to public safety and mission-critical systems.

Analogue PMR systems are typically used by closed user groups, such as taxi companies or emergency services, and are owned and operated by the same organization as its users. These systems consist of one or more base stations and a number of mobile terminals, and are often developed into 'trunked' systems like TETRA, which provides flexibility and economy in the allocation of network resources.

A notable exception to traditional PMR systems is PMR 446, a consumer 'walkie-talkie' that has six analogue channels allocated in most European countries for use without a licence.

Analogue Private Mobile Radio (PMR) has been a staple in Europe for many years, serving a broad community of users.

Available for both licensed and unlicensed spectrum use, PMR applications range from low-cost walkie-talkies aimed at the consumer market to public safety and mission-critical systems.

A comparable technology known as Specialized Mobile Radio (SMR) exists in the United States.

PMR is also widely used by emergency services, which rely on its reliability and efficiency.

PMR networks consist of one or more base stations and a number of mobile terminals, serving a closed user group and typically owned and operated by the same organization as its users.

Trunking is a technique where resources are shared, providing flexibility and economy in the allocation of network resources.

This allows communication channels to be allocated for the duration of a call and then automatically released to be used for another call.

Many PMR systems allow Direct Mode Operation, enabling terminals to communicate with each other directly when they are out of the coverage area of a network.

The call set-up times in PMR systems are generally short compared with cellular systems.

For another approach, see: Voice Call Continuity

The narrow-band option is a great choice for professional mobile radio, offering a range of benefits. DMR tier 1 equipment is often combined with analogue PMR 446 to provide 16 digital and 8 analogue physical channels at 446 MHz.

This setup allows for a total of 16 digital channels, which is a significant increase in capacity. With privacy coding, even more logical channels are available. A new harmonized 446.1 - 446.2 MHz licence-exempt band is being opened up by several European countries.

The ETSI has defined a narrow-band digital radio protocol for this band, called 'digital PMR', which utilizes 6.25 kHz channel FDMA. This protocol provides for consumer and low-power commercial applications using a maximum of 500mW e.r.p.

Suggestion: Wireless Transaction Protocol

Selective calling is a feature that allows remote or mobile stations to only hear specific calls being made.

This can be particularly useful in situations where not all calls need to be heard by everyone. For example, in a system where all calls are being made, a system of selective calling can help reduce noise and distractions.

A different take: Land Mobile Radio System

Dual Tone Multiple Frequency (DTMF) signal is one way to achieve selective calling. It's a method of transmitting multiple signals at the same time, allowing for more precise control over who can hear a call.

The Continuous Tone Coded Squelch System (CTCSS) is another way to achieve selective calling. This system uses a specific tone to unlock a channel, allowing only those with the correct tone to hear the call.

In practical terms, selective calling can help improve communication by reducing background noise and minimizing unnecessary distractions.

DMR is a direct replacement for analogue PMR, offering improved range, higher data rates, and more efficient use of spectrum. Digital Mobile Radio (DMR) is a European standard, produced by ETSI, defining a direct digital replacement for analogue PMR.

DMR is a scalable system that can be used in unlicensed mode and in licensed mode, subject to national frequency planning. This means it can be used in a variety of settings, from consumer and short-range industrial applications to professional and public safety applications.

For your interest: Digital Mobile Radio

The technology promises improved battery life, and DMR has been designed to fit into existing licensed PMR bands, aiding the transition from analogue to digital. This makes it a seamless upgrade for users of analogue PMR systems.

DMR supports a range of features, including fast call set-up, calls to groups and individuals, and short data and packet data calls. These features are beyond the capability of analogue schemes, making DMR a more advanced and efficient option.

Here are the three tiers of DMR:

DMR has been designed to fit into existing licensed PMR bands, meaning there is no need for rebanding or relicensing. This makes it a convenient and cost-effective option for users of analogue PMR systems.

Professional Mobile Radio (PMR) products are purpose-built tools designed to deliver instant voice and data over narrowband radio frequencies. They're perfect for use in a diverse range of environments, including outdoors, in low-coverage areas, and even in the presence of explosive substances.

One key benefit of PMR products is their ability to perform in extreme conditions. This is due to their rugged design and reliable technology, which ensures they keep working even in the most challenging environments.

TETRA, or Terrestrial Trunked Radio, is a type of PMR system developed by ETSI to meet the needs of commercial and emergency services. It's designed to provide seamless communication across borders, making it ideal for use in Europe.

Here are some key features of PMR products:

By using PMR products, organizations can ensure they have reliable and instant communication, even in the most challenging environments. This makes them an essential tool for many industries, including public safety and emergency services.

ETSI Technical Report TR 102 398 provides a useful introduction to DMR, a crucial aspect to understand for professionals in the field.

DMR protocol conformance testing and test suites are covered in ETSI Technical Specification TS 102 362 parts 1 to 3, ensuring that devices meet specific standards.

The narrow-band or 'digital PMR' protocol is defined by ETSI Technical Specification TS 102 490, a key component in professional mobile radio systems.

Take a look at this: Radio Resource Location Services Protocol

DMR is an open standard technology, which means radios without proprietary technology or licenses can work with other brands.

This is a huge benefit for users who may not want to commit to one brand of radio, but need robust and reliable communications.

ETSI Technical Report TR 102 398 provides a useful introduction to DMR, and Technical Specification TS 102 490 defines the narrow-band or 'digital PMR' protocol, which supports this open standard.

Users can enjoy flexibility and freedom in choosing their DMR radios, without being tied to a specific brand or technology.

Consider reading: Mobile Technology

CTCSS is a widely used system that employs subaudible tones, also known as PL tones, to carry selection information.

These subaudible tones are transmitted below 250 Hz, which is below the audio range passed by most mobile radios. They are filtered out and therefore not heard.

The advantage of this system is that the subaudible tones are transmitted continuously, enabling the squelch to open and the audio to be heard even if the signal fades and then increases in strength.

Systems using CTCSS can provide up to 37 different tones, ranging from 67 Hz to 254.1 Hz. This allows for a variety of mobiles to be called selectively.

The subaudible tones are transmitted in addition to the normal voice channel, but they are not audible to the user.

LMR is a crucial tool for mission-critical communications, providing instant responses and quick, secure transmissions in various environments.

Its importance lies in its ability to connect everyone, regardless of location or technology, making it a vital asset for personnel on the front line.

LMR systems have undergone upgrades, enhancing their reliability and interoperability with other systems, allowing for seamless integration and efficient communication.

This is particularly essential for teams that require instant responses, such as those in emergency services or critical operations.

Here are some key benefits of LMR:

In the world of professional mobile radio, a few key players stand out from the rest. Motorola Solutions is a leading provider of professional mobile radio solutions, offering a range of products that cater to different industries and use cases.

Motorola Solutions' products are widely used in public safety, such as by police and fire departments, and in industries like transportation and logistics.

See what others are reading: Motorola Mobile Device Activation Assistance with Spectrum Mobile

Their solutions are designed to provide reliable and secure communication, with features like encryption and authentication to ensure sensitive information is kept safe.

In a notable case study, Motorola Solutions worked with a major transportation company to implement a mobile radio system that improved communication between drivers and dispatchers, resulting in reduced response times and increased efficiency.

Professional mobile radio systems are used by a variety of organizations that require reliable communication over short distances.

Police departments rely on these systems to maintain contact with their central base stations. Fire brigades also use them to stay connected with dispatchers. Ambulance services and emergency responders have similar needs. Commercial companies like taxis and logistics services also use professional mobile radio to communicate effectively.

These systems are designed for business use, not for personal communication. They're typically used in areas with high foot traffic or in situations where quick communication is crucial.

A different take: Azure Professional

Hytera is a leading global provider of Professional Mobile Radio (PMR) solutions. They have a strong presence in the industry, with a focus on delivering high-quality communications systems.

One notable example of Hytera's work is the Kazakhstan Railway project, where they implemented a TETRA digital radio communications system for JSC "NC Kazakhstan Temir Zholy". This system enables safe and efficient communication for the national operator of the main railway network of Kazakhstan.

Hytera's expertise in PMR solutions has earned them a reputation as a trusted provider. Their commitment to innovation and quality has led to successful projects like the Kazakhstan Railway implementation.

You might enjoy: Software Communications Architecture

JSC "NC Kazakhstan Temir Zholy", the national operator of the Republic of Kazakhstan's main railway network, plans to fully adopt TETRA digital radio communications as a standard.

This decision was likely made to ensure operational efficiency and safety of staff, customers, and members of the public, who need to be able to communicate instantly and securely at the touch of a button – regardless of where they are on site.

The adoption of TETRA digital radio communications will help Kazakhstan Railway avoid communication breakdowns that often occur when relying on standard IT infrastructure with no standalone capabilities.

Kazakhstan Railway's decision to adopt TETRA digital radio communications is a testament to the importance of having dedicated and purpose-designed equipment for critical situations where low-key collaboration is essential.

The TETRA digital radio communications system will enable Kazakhstan Railway to communicate discreetly during situations where low-key collaboration is essential, ensuring the operational efficiency and safety of staff, customers, and members of the public.

Check this out: Mobile Collaboration

For business users, DMR can be a commercially attractive alternative to TETRA. This is particularly true for those who don't need or can't afford the complexity of TETRA.

One of the main advantages of DMR is that it offers at least the same range as 12.5kHz channel analogue FM, making it a practical proposition for a direct replacement or upgrade from analogue to DMR.

Intriguing read: Is Xfinity Mobile Better than T Mobile

DMR has been specifically designed to offer improved range, higher data rates, and more efficient use of spectrum compared to analogue systems. This makes it an attractive option for business users who want to upgrade from analogue FM without sacrificing performance.

DMR can be used in unlicensed mode (in a 446.1 to 446.2 MHz band) and in licensed mode, subject to national frequency planning. This flexibility makes it a versatile solution for business users with varying communication needs.

Here's a quick rundown of the three 'tiers' of DMR:

These tiers offer a range of options for business users, from basic to advanced communication needs.

Modulation is a key aspect of professional mobile radio, with narrow band frequency modulation being the chosen form of modulation, although airport services use amplitude modulation.

A deviation of 2.5 kHz is typically used for FM, which enables a channel spacing of 12.5 kHz to be implemented. This efficient use of channels allows for effective reuse of frequencies in different areas.

Base stations must be located sufficiently far apart to prevent interference, and selective calling techniques like CTCSS and DTMF are used to ensure as many mobiles as possible can use a given channel.

Modulation is a crucial aspect of TETRA technology, and it's used to enable effective communication over radio waves. Typically, narrow band frequency modulation is used, although airport services use amplitude modulation.

A deviation of 2.5 kHz is used for FM, which allows for a channel spacing of 12.5 kHz to be implemented. This efficient use of channels is essential for PMR, which has high demands.

Base stations need to be located far enough apart to prevent interference, and selective calling techniques such as CTCSS and DTMF are used to ensure multiple mobiles can use a given channel.

DTMF, or Dual-Tone Multi-Frequency, is a system used for sending tones over phone lines to control devices. The relevant code, consisting of one or more digits, is sent to the station programmed to respond to the number.

Typically, one or two digits is enough to open the squelch on the receiver, allowing audio to come through. This can be a significant advantage in many situations.

However, if the receiver doesn't pick up the code at the exact instant the DTMF signalling takes place, it won't respond to any of the message. This can be a major issue, especially with mobile stations that often lose the signal for short periods as they move around.

A different take: Radio Code

LMR frequency works in various ranges, including 30-50 MHz (Low VHF Band), 150-172 MHz (High VHF Band), and 450-470 (UHF).

The specific frequency range used by LMR determines the area it covers, with different ranges offering varying levels of coverage.

LMR is available in multiple frequency bands, making it a versatile communication method for various environments.

The 30-50 MHz range is suitable for commercial and public safety usage, while the 150-172 MHz range is also used for commercial and public safety.

The 450-470 MHz range is used for UHF LMR, which covers a wider area than the Low VHF Band.

The frequency range used by LMR can affect its performance and reliability, with some ranges being more prone to interference than others.

LMR systems have received upgrades to improve their reliability and interoperability, making them more suitable for mission-critical communications.

Discover more: DECT Ultra Low Energy

PMR is a durable and dependable technology that offers a broad range of products and features to cater to every user's specific requirements.

Our team of experts can help you find the right solution for your communication needs, whether you're an end-user or a reseller looking to provide PMR products to your customers.

PMR can be used independently of any third-party infrastructure, including mains power, and can even operate back-to-back, making it a trusted and long-standing technology of choice for many.

PMR offers a broad range of products and features to cater to every user's specific needs.

Our team is highly experienced in PMR and can help you find the right solution for your requirements.

With a proven track record of delivering durable and dependable communication technology, you can trust PMR to meet your needs.

Whether you're an end-user or a reseller, our team is here to assist you in finding the right PMR product for your customers.

Get in touch with us today to get started on finding the perfect PMR solution for you.

One of the biggest advantages of PMR is that it can be used independently of any third-party infrastructure.

This means you can use it even without mains power, and it can operate back-to-back.

PMR can continue to operate even in the event of a total power loss, making it a reliable choice.

This self-sufficiency is a key reason why PMR is a trusted technology of choice for many.