Trigger using camera's digital input or motion?

Feb 13, 2015
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How do I get this to work with a Foscam FI9805P and FI9831W?
The cameras see the motion and send me an email snapshot, but BI does not trigger!?!?
I have the tick box selected under Video->Configure->Other options...
If I enable the BI motion detect, it works, but I don't have the horsepower to run 3 cameras! :-)

Any help is appreciated!
Thanks, Richard