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a. Click I/O Setting from the system setup page via IE, and check
"Out1" to enable I/O signal.
b. Output Test
After the external input and output hardware is installed, you can use
the "Relay Out" bottom on the live video page to test if DO / Relay Out
works.
(i) On Off Switch mode:
Clicking "ON" will trigger the external output device for 10 seconds.
For example, your alarm buzzer will continuously ring for 10
seconds. After 10 seconds the buzzer stops ringing, or you can
manually break off the output signal by clicking "OFF".
(ii) Time Switch mode:
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