Aposonic A-S1604R20A - Manual (Page 17)

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3.2 Optional Connections
 Audio inputs
Connect the audio input connectors to the audio line-outs from system cameras or
other audio sources. Please make sure to associate the audio inputs with the
cameras in Camera Setup as described in
Section 6.2 accordingly.
 Audio output
Connect the audio output connector to the audio line-in from speakers.
 Alarm inputs
Connect the alarm inputs to NC and/or NO type of alarm signals. Please make
sure to setup the alarm configurations in Alarm Setup as described in
Section 6.3
accordingly.
 Alarm outputs
Connect the alarm outputs 1-2 to NC type of alarm signals, alarm outputs 3-4 to
NO type of alarm signals.
 Ethernet
Connect the Ethernet connector to a standard twisted-pair Ethernet cable for
remote access via LAN or internet. Please make sure to setup the related
configurations as described in
Section 6.10 Network Setup .
 USB 2.0 disk drives, DVD+RW, card reader, etc.
If the user wants to use USB2.0 peripheral device to retrieve important recorded
images and/or audio, please connect it to the USB port connectors.