If a network gateway allows a single audio channel to connect to the DMR network, what is the function of a telephone gateway?

As the name would suggest, a telephone gateway is the interface that enables radio users and telephone users to communicate with each other. The DMR network utilizing a Network Gateway can support direct communications between users on DMR and telephone users.

If you weren’t sure how to answer this question, the video below and the lesson DMR Network Architecture: Telephone Gateways can give you an understanding of how telephone gateways work and... Continue Reading

A network gateway is a simple device, but the function of this device might need some explanation if you are not familiar with how the gateway works.

The lesson DMR Network Architecture: Network Gateways gives you an overview of how a network gateway works, function and features, and how the network gateway can be used to control the link between a conventional set of base stations and the DMR network.

By the end of the lesson, you will be able to identify the function of a network gateway, and also understand the interfacing between network gateways and Line Dispatch... Continue Reading

How many control nodes are there in a DMR network? Which is the control node in a multi-node network? What is the function of a node?

If you are having trouble answering these questions, it might be time to take a refresher course on the role of nodes in a DMR network.

In a DMR network, there are nodes with two functions, a control node and a switching node. There is only one control node in a network, and in a multi-node network, the lowest numbered node is the control node.

To help you visualize what this explanation looks like, the course DMR Network Architecture: DMR... Continue Reading

If you have been following our posts on the architecture of a DMR network, you will be beginning to understand the full overview of how the network functions. This time we will be taking a look at the two main architectural types of a DMR Tier 3 network.

The first main type of architecture in a DMR Tier 3 network is a centrally controlled network in which powerful computers are employed to control and switch voice and data packets. The second type is a distributed model where each site in the network has switching and controlling abilities of voice and data between... Continue Reading

Do you know why IP was chosen as the method of moving voice and data? Confused about what IP actually is? The answers to your questions on Linking Infrastructure are a few clicks away.

If you aren’t familiar with the various elements of a DMR network, the IP backbone might be a foreign element to you. The lesson DMR Network Architecture: Linking Infrastructure gives you a clear description of what linking infrastructure is and how it is all interconnected.

If you would like to learn more about the architecture of a DMR network, watch the video below and read the... Continue Reading

The ability to identify the key elements of a DMR network and grasp how they work can be daunting. Thankfully, the Radio Academy makes it easy to learn.

The DMR network design in scalable, it can be a single site, or it can be a large wide area network but there are elements that stay the same in all networks. The lesson DMR Network Architecture: Network Overview, lists these elements in a clear and easy-to-understand way. The lesson also includes a diagram of a full DMR solution. By the end of the lesson, you’ll be able to understand how it is all connected.

If you would... Continue Reading

Better voice quality, better functionality and security as well as channel efficiency were the original requests that led to DMR being ratified in 2005. There are many other benefits that DMR offers to users, technicians and managers.

As well as being an open standard technology, DMR is also capable of transmitting voice, but the end-to-end digital nature of DMR enables data application such as text messaging, GPS and SCADA. Along with 7 other benefits that the lesson Benefits of DMR identifies, it is apparent why the standard is so popular.

If you would like to learn the... Continue Reading

Developed by the European Telecommunications Standards Institute, Digital Mobile Radio (DMR) was the solution to calls for better voice quality, functionality, security and channel efficiency. Since then it has become one of the most popular standards in critical communications.

If you aren’t familiar with this standard there are some differences between DMR and other standards such as P25 and NXDN. The lesson DMR Standard: What is DMR? will give you a comprehensive and easy-to-understand introduction into what DMR is, what Tiers the standard works on and how DMR utilizes TDMA... Continue Reading

If you are part of a larger agency a trunked network could be incredibly beneficial to how your radio communications operate. But what is trunking and how does it work?

Many know of the conventional system where there are dedicated channels allocated to specific users or a group of users. However, trunking has become increasingly important as it offers huge advantages over conventional for larger agencies.

The lesson Communication Systems: How does Trunking Work? describes in both conventional and trunked systems and how they work.

If you would like to learn more about... Continue Reading

P25, DMR, Tetra, MPT– there are many types of radio technologies that support radio operation. Many of these technologies are suited more to a particular industry and work in their own specific bands.

The Communication Systems: Different types of Radio lesson covers each technology, including Conventional FM and NXDN, explaining each one including the industries they are commonly used in, their specific bands and their channel spacing, among other pieces of useful information.

To learn more about radio technologies watch the video below and read the accompanying... Continue Reading