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4+n wiring guide- Connecting to a 4+n type analog system is easy, but it's unique for each different doorphone system.
- You need to find documentation for your specific doorphone by its part number, and figure out, which connection serves what purpose in your specific case.
- Once you have that, you can just simply connect the wires to their respective terminals on the green connector, as explained below:
![](/img/connector_blurred.jpg)
D1 โ door opening pin
D2 โ should go to either GND or to a power supply, depending on how the door opens. (if the door opens when its pin is pulled to gnd, this port should go to gnd as well)
C โ Call detection line
AI โ Audio in
AO โ Audio out
G โ GND
2, 2 โ These are used in a BUS system, ignore these for 4+n systems.
If you're stuck, or can't find the necessary information about your system, contact us at Phonein customer support, and we'll help you with the setup process!