Hello,
I am trying to connect my DVR with a GSM alarm system.
The idea is when the alarm is armed, the DVR cameras should act as motion detector and send a signal to the alarm when there is movement. That it turns calls my mobile.
On its own each system works fine.
I am a little confused with always open and always closed, also I have read that I need to use EOL resistors. Example attached.
Please see the connections on each device, photos attached.
Thanks