Yes. it comes back everytime, if i don't power off the camera the DSL comes back online, but in a few seconds it goes down again.
I never tried that of flashlight.
for exemple, with the camera power off, In the values of router, the SNR(Signal to Noise Ratio) is at 10 dB, if i turn on the camera power the SNR goes down to 7.5/8 what causes the DSL line to go down.
:S
I must say that the camera is connect to a tv, that is conect to normal RF television signal.
If I disconnect the RF cable of the tv, it still decrease the SNR but only about 1 dB.
I also tried to conect the camera to a VCR and then conect the VCR to RF signal of the house, so i can see the CCTV channel all over the house, and it do the same thing.
I don't know if have anything related, but i'm using a normal cable, to connect the camera, and it's about 30 meters long.