In this guidance we will be looking at the steps for setting up an external microphone on a Hikvision camera with an audio terminal block.
Hikvision cameras have an audio terminal block if their product code ends with an 'S' suffix - e.g. DS-2132F-IS / DS-2732-IWS (excluding certain models with built-in mics) and most speed dome cameras (e.g.DS-2DE4225IW-DE).
Preparing the microphone
Configuring the microphone with Synology
Configuring the microphone with a Hikvision NVR
Step 1 - Preparing the microphone
First, you need to find the right in-line active microphone and prepare it for the installation. If the plan it to mount it outside, make sure that it is IP-rated or at least cover it from the elements.
This microphone will require an external power supply, such as a simple 12V power supply.
Now that you have the mic, you will need to make some adjustments to the cable in order to get it to work with your camera. By default, the microphone will come with a Phono RCA connector (shown in the picture below) You will want to remove this by cutting the cable here. Be careful, DON’T cut the end with the microphone on, or the wire that ends in the power supply, this will break the microphone.
Once you have cut the end of the Phono wire, strip about an inch of the wire to reveal the copper, and center white wire. Separate the copper from the center. The copper wire will be the basis of the ground wire, and the white wire will be the 'Audio line in' wire.
Step 2 Configuring the microphone with Synology
Synology makes it pretty easy to get a microphone working on a camera that you intend to use in conjunction with surveillance station. Once you have the microphone attached to the camera, add the camera to surveillance and make sure that the audio codec G.711 is selected, and enable audio recording in the recording settings
Step 3 - Configuring the microphone on a Hikvision NVR
It gets a little trickier with a Hikvision NVR as the cameras do not default to the correct settings for audio upon connecting the two. Now, you want to be doing this with a monitor and mouse directly connected to the NVR.
Open up the menu and navigate to the 'Record' submenu.
From here, on the left hand side click on the Parameters option.
Now, select the camera with an attached microphone, and look at the stream type; this should be set to video & audio.
Once this is set, and you've made all the other settings are as you expect them to be hit apply.
Finally, click the more settings button and check the 'record audio' button. Now your camera should be capturing and recording audio through the microphone.