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The Pelco 8-Channel Audio Card for DX81XX Series DVR updates the 8-channel capture card of DX81XX series DVR to record up to 8 channels of audio data. The audio card is placed inside the capture card, and there is no jumper or switch setting on it. Each capture card can accommodate 1 audio card.
In case the 8-channel audio card is installed in a 16-channel capture card, audio inputs 1 to 8 are available for recording; audio inputs 9 to 16 can be configured but audio data is not recorded. The capture card has to be removed for installation of the audio card. In case you are updating only 1 audio option of your DVR that has 2 capture cards, you need to install the audio card on to the main capture card, and do not have to remove the optional capture card.
Updates 1 capture card to record up to 8 channels of audio data