As I said, you'd have to find out the characteristic impedance at the u.FL connector first, and then select the appropriate coax (obviously at the frequency of

As I said, you'd have to find out the characteristic impedance at the u.FL connector first, and then select the appropriate coax (obviously at the frequency of interest). BTW does the PoE doorbell you linked actually have an ethernet network, or does it just use it for power? I fully concede my original comment should have replied your parent, but the following replies were responses to the contents of your comments (Frankenstein, etc.)