Sim900 Jumper s2

Using Arduino Networking, Protocols, and Devices
1

Hey guys,
i'm running this shild and everything is working fine.

But on this Shield there are 3 Jumpers and i have absolutly no idea for what.
Can you help me and explain the function.

I already red all Datasheet but still no idea. The Shild works with all 3 Jumpers Connectet like in the Picture.

much thanks

sim900.jpg
sim900.jpg600×600 259 KB

2

That isn't an Arduino product. You'd be better off asking the manufacturer / vendor.