The last lesson of the Introduction to DMR Radio Academy course is Call Types and Features. This lesson consists of four topics that identify the different DMR call types and each of their features.

Trunked radio systems enable radio users to make two main types of calls on a DMR system; the first main type of call is Voice Calls.

There are many types of voice calls including individual calls, talk groups calls, and telephone and gateway calls. If you would like to learn more about these calls and how they work, watch the video below and read the accompanying Voice... Continue Reading

Do you know the function of channel rotation? What happens when a call won’t stay on a particular channel? If you are having trouble answering these questions, it might be time to brush up on your Channel Configuration knowledge.

Channel rotation is key in avoiding the situation where a channel may have problems and a call won’t stay on a channel. The lesson Channel Configuration and Numbering explains channel rotation and channel pooling, a feature that allows the same frequencies to be used on multiple sites.

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

The next topic in the Introduction to DMR Radio Academy course is Channel Operation and Configuration.

In the lesson Physical and Logical Channels, Noel Farrelly describes the two kinds of channels that are included in a DMR system and how they function.

By the end of the lesson, you will have in-depth knowledge of Physical and Logical Channels, be able to name and describe the two channels, how they work within the network, and what options exist for how channels can be set up. The lesson will also explain how each channel can be categorized into... Continue Reading

Do you know how many network administrators can access a DMR network at one time? Are you able to identify the tasks a network manager is able to carry out with the web user interface?

There are a number of configuration, monitoring and reporting tools that provide effective network management on the DMR radio network. These tools enable network managers to perform a number of tasks.

If you are unsure of what these tasks are specifically, the lesson DMR Network Architecture: DMR Network Management lists the tasks that can be carried out using a web browser and... Continue Reading

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... 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... 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... 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... Continue Reading