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May 6, 20156 min read

Connecting DMR Tier 2 with a Voice Recorder, Console and AVL


Connecting DMR Tier 2 with a Voice Recorder, Console and AVLThe team here at Tait have put together some videos to give more information about our DMR products.

We will be uploading more product videos over the coming weeks. In this video learn more about how a DMR Tier 2 network connects with other devices and applications.

Iain Scott Senior Design Engineer and Evan Forester Content Marketing Manager will take you through the setup.

Watch the Video Here:

You can also watch the other DMR videos in this series:

Video Transcript

Evan: Once again, we’re here with Iain. And this is a video explaining how to connect your DMR: Tier 2 network to a console, a recorder, or an AVL application. So Iain, this is another excellent drawing. Can you explain it for us?

Iain: Okay. So last time we talked about how radios can talk on a Tier 2 DMR system. So one of the advantages you get with Node is you get these interfaces, so a voice recorder can record via the VRP protocol in the Node. It’s the same as Tier 3.

For the consoles, we use AIS protocol, which is a SIP-based protocol. The last one we have is our Monitoring API. Now, this one allows us to get at location of radios. Now, this uses JSON to do that. So we’ll explain more of this as we go along.

Evan: The first thing you mentioned was sound recording. How do I set that up?

Iain: Okay, so the first thing we need to do is set up the voice recorder on the node. So we go into the web UI of the node and we go down to the network settings. In here, we will find the voice recorder. Now, know the setup so you can have two voice recorders, so we’ve got two addresses here. All you have to do is go in here enter in the IP address of your voice recorder.

Now, the protocol we use is VRP, so you need a voice recorder that supports VRP. We happen to have one. Okay, so this is the Eventide voice recorder that we’re using today that we just hooked up. You can see its IP address is what we typed in the node before. It’s now connected up, so if I make a call on this radio, it should record it.

Hello, one, two, three, four.

If we refresh this, hopefully it found our call that we just made. And if we play it, “Hello, one, two, three, four.” You can hear that it recorded the call.

Evan: How do we connect DMR Tier 2 in the console?

Iain: Okay, so today we’ll show you how to hook up a console. So in the main menu, we look under here in SIP Lines. So our console uses AIS, but use it over SIP. And you can see here we’ve got one already set up. So normally you would come in here and you would click add, but today, we’ll edit this one to show you the settings you have in here.

Now, the first thing is your channel group. So all the Tier 2, you have a channel group associated with each base station, and this is what you assign a console to. So each console line can only talk to one channel group. So in here, we said see we’re talking to Channel Group 51 that it’s hooked up and in our picture before we had a base station and a radio. And this radio at the moment, it’s talking to Channel Group 51.

The type you set up is AIS. And this username and password is basically how the console identifies itself to the node, so it has to login with this username and this password. So we’ve set up the console to be 450 and its password is “tait.” So when we configure the console, we’ll have to know this information. And that’s all we have to do. It’s that easy.

Evan: Okay, so now the DMR Tier 2 network’s connected to this console.

Iain: And we can see here from the screen that the radio is idle, so it’s ready to talk. So if someone talks,  I’ll talk first on the console. So if I push the PTT hello, there. This is Iain talking on the console. Now, we can see on the screen that has come up saying I’m talking to Group 901, which this radio is part of. And hopefully, if you push the PTT

Evan: I can talk back to you.

Iain: Yeah.

Evan: And we can

Iain: And I can hear him.

Evan: Yup.

Iain: If we look at the screen again, you can see that it’s come up saying that Radio 700 is talking to 901, which is this radio here.

Evan: There you go.

Iain: So one of the things this console has built in is location services. So we can see the node is telling this console where this radio is located. So we can see on the screen exactly where this radio is at the moment, which is here at Tait Electronics.

Evan: Yeah, so really helpful for tracking where your people are and when. Now, you said we have a monitoring API which we can use for location services. So how do we set that up?

Iain: There’s not much to it, really. All you really need is a user setup that allows the AVR (Automatic Vehicle Location) application to log into the node. So really all you have to do is go in here and add a user. So we’ve got quite a few users on this system at the moment. But we see here, I’ve set up one for API demos, and you can see it’s a read-only, so you get this. You can see we have setup one user, access level: read, so all anyone can do is access the API.

Once we’ve set up the API, then we need some application to talk to it. It uses JSON to talk to our monitoring API. We’ve got a whole technical node and how to use this. It’s the same as Tier 3, and I’ve got a little demo here that we’ve written that uses JSON. Here, we can see a map showing the location of this radio, radio 700.

Now, if we want, we can go and have a look at the raw information. So this is the information that you get out of the API. You can see the address of the radio, where it was last located, the speed, course. There’s a few other fields that you can sometimes get depending on what format of AVL information is configured in the radio, so this is all the information you can get through the API.

Evan: Okay. Well, hey, thank you, Iain, for showing us around and letting us know how we can connect DMR Tier 2 to these other business systems.

Iain: No problems.


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