Installation & System Setup

Two-Way Audio Via A MaxxOne DVR

453 views 2nd August 2017 maxxone 3

In this article we will be covering how to set up two-way audio with a MaxxOne DVR, we will be adding a separate guide for MaxxOne NVRs shortly.

There are a number of scenarios where a two-way audio configuration through your MaxxOne CCTV system will not only prevent the need for a separate communication system but perhaps also be more effective, for example:

A series of microphones could help identify any authorised activity during a remote site patrol, as well as enabling you to inform anyone approaching the perimeter that they are in a restricted area and being recorded. Applying the same premise to a home user – if you were away from home and received an event notification, this would allow you to talk with whoever is at the property without the need for a phone call.

The number of applications is endless but hopefully this gives you an idea of how two-way audio can be used to enhance your CCTV experience. So what exactly do you need to set up such a system with your MaxxOne DVR?

  • A speaker with a RCA (phono) output
  • A BNC microphone or a standalone microphone with a RCA connection
  • A male to male RCA cable* (usually sold separately)

We will be discussing the use of BNC microphones in this article but the same principles apply when using a standalone microphone – the only difference being standalone microphones will be connected directly to the audio in, rather than working in series with the camera.


Step 1: Fitting the microphone to the camera

Unplug the existing power and BNC connections from the camera, do not unplug these from the DVR as you will need them for step 2. Insert the camera-bound connections from the BNC microphone into the camera, these should be identical to ones removed initially.

A typical BNC microphone cable with 2 connections for the camera and 3 for the DVR


Step 2: Fitting the microphone to the DVR

Take the power and BNC connections that you removed from the camera in step 1 and insert into connections on the microphone – in the picture above these would be the right and left connections, respectively. You will now need the male-to-male RCA lead* (usually sold seperately), with one end going to the remaining microphone connection and the other end to the relevant audio input.

Step 3: Installing the speaker(s)

Once you have picked the ideal location for your speaker(s), simply take the RCA connection and plug it into the DVR’s audio output.

If you are using a zonal speaker system via a switch / mixer, ensure you have noted down which speaker is at each camera location. For simplicity’s sake, it is recommended to match the camera channel numbers up to the audio channels of your switch / mixer, where applicable.

Step 4: Enabling audio on the DVR

Bring up the main menu on your MaxxOne DVR and proceed to the “parameter” menu, from here go to the “record” sub-menu and finally the “mainstream” sub-menu. You will now see a list of channels with a few options available, one of which is the tickbox for enabling the audio – check audio box for any channels you have added microphones or speakers to and click “save”. If you wish to have audio enabled while substreaming, you may also apply these changes on the substream menu.

Step 5: Testing communications

Load up either mobile or desktop version of the MaxxOne CCTV Viewer application, depending on how you prefer to monitor your MaxxOne DVR.

On the toolbar at the bottom of the screen, you should currently see a speaker icon with a line passing diagonally through it. Click this icon to enable playback from the connected microphones – depending on your network speed there may be a small amount of latency with the audio. To talk to the connected speakers, select the microphone icon and start talking.

Older versions of the MaxxOne CCTV Viewer application did not include this feature
Please download the lastest version if you cannot see the speaker or microphone icons

Congratulations, you now have two-way audio via your MaxxOne DVR!


We hope you found this guide easy-to-follow and that you are enjoying the added benefits of two-way audio communication. Please check out our other articles for interesting tips and tricks to get the most out of your MaxxOne video recorder.

Was this helpful?

Leave A Comment