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How It Works

In a similar way to how VOIP (Voice Over Internet Protocol) has revolutionised land line telephony, Radio over IP is doing the same with LMR (Land Mobile Radio) for both traditional analogue and digital radio users that require wide area coverage communication. Truly commercial grade solutions however are very different.

TR Telecom’s Wide Area Coverage Communication (WACC) solution:

  • Uses the RAPID PTT software platform totally designed, engineered, developed, and supported in Australia.
  • Uses specifically developed and configured Android O/S devices as user terminals and PCs for general system configuration and team communications & support interface software – Advanced Dispatcher Console (ADC).
  • Removes the coverage limitations of traditional two-way radio enabling users to transmit voice messages over cellular broadband networks in real time and true one-to-many format.
  • In addition to the wide and extensive coverage provided to millions of Australians by the nation’s most popular networks, namely Telstra, Vodafone, and Optus, the overwhelming benefit to traditional LMR users requiring wide area coverage is the significant savings of LMR repeater infrastructure that is often required.


Rapid PTT Is

Designed, developed and managed in Australia, RAPID PTT utilises a completely new proprietary protocol designed specifically to replicate the usage behaviours, volume of calls, number of users and groups associated with LMR wide area coverage requirements.

Whilst at face value, it may be easy to compare our solution to other inferior PTToC offerings, especially in low volume demonstrations and usage, the difference between RAPID PTT and others becomes undeniable as more users, channel groups, and call volumes increase.

As important as maintaining speed and quality of communication as call volumes increase, the RAPID PTT protocols enable increased features and functionality to be added to the system without compromise and experience degradation, and underpins our commitment to continuous improvement.

Depending on environmental and usage, choice from a growing range of enabled devices (Portable, Glass, and Mobile) and PC/Laptop for the Advanced Dispatcher Console.
Transmit communications clearly over the highly reliable existing public cellular networks, private network Wi-Fi, or Ethernet connection.
Data calls are securely transmitted to and from the RAPID Server using a series of protocols, including AES 256 rolling encryption.
Software and data is securely hosted via AWS (Amazon Web Services) ensuring highest levels of system uptime, security, and quality.

What Rapid PTT Isn’t

There are an increasing number of “solutions” and software coming into the market purporting to offer PTToC as a valid alternative to LMR repeater networks, they are unfortunately nothing more than Voice over IP – a telephone call using a Push-to-Talk function on a device to make what is effectively a conference call.
They use a combination of protocols used fundamentally within IP landline based VOIP systems known as SIP & RTP.

SIP (Session Initiated Protocol)
– Used to establish/set up a call (known as a session)

RTP (Real Time Transport Protocol)
– Used once a “call” is established to exchange voice (actually data) packets between users

SIP/RTP based solutions provide the resemblance of a traditional LMR PTT experience in the sense the user can initiate a “voice” call to a number of users on the same group (channel), however all that is effectively occurring is a standard daisy chain conference call.

These SIP/RTP solutions are prevalent, yet not suitable for business and commercial applications that require traditional DMR communication styles and behaviours as they don’t provide real One-To-Many simultaneous communication.

Voice over IP (VoIP)

  • The PTT initiates the process to find and assign radios in the group to a talk channel.
  • 1.1 sec to set up the first one-to-one call, with added latency adding more users to the group.
  • At 1.1 sec one radio is found and moved to a talk channel. Additional time is required to find and assign the rest of the group.

RAPID PTT - Radio over IP (RoIP)

  • All radios are always listening to a talk channel.
  • No delays with large group sizes.
  • 80 m/sec and you are talking to the whole group regardless of size.


Why Do We Need It

Superior Coverage / No Infrastructure Costs / Ease of Deployment / Evolving Technology

Traditional LMR users requiring wide area coverage communication have in the past been confined to subscribing to one of a number of Land Mobile Radio (LMR) or Digital Mobile Radio (DMR) networks generally owned and operated by organisations of varying sizes.

These “networks” are effectively a series of frequency repeaters positioned in varying locations (usually in main cities) to extend a given set of frequencies that users have subscribed to.

Larger networks, spanning a number of cities were “linked” to provide extended radio frequency coverage, however, the cost of establishing, maintaining and ongoing development of what is effectively “narrowband” frequencies was/is expensive and as a result the level of investment in these networks has stagnated and in some cases been withdrawn. Evidenced with a number of networks being discontinued.

In the face of increasing levels of investment required to achieve a truly reliable and expansive LMR network, and the continual development and improvement of the cellular broadband networks, now 4GX and the imminent 5G, alternative solutions for traditional LMR network users has arrived.

TR Telecom and its partners have a true replacement for traditional land mobile narrowband systems such as DMR, DMR3, TETRA, and conventional systems.

Our focus is to provide unprecedented high speed and high quality voice performance, delivering an instant voice experience already familiar to you. TR Telecom’s Wide Area Coverage Communication (WACC) solutions removes the limitations of traditional narrowband systems (such as coverage and data speeds) and unlocks data integration, enterprise applications, and the broader world of Internet-of-Things (IOT).