NightBreeze wrote:Here’s some thoughts to help you debug:
Do you have a multimeter? I’d check all solder connections and verify that the battery is outputting 9V and that the line is induced with 9V.
Also check your Dreamcast modem, have you verified it’s NTSC, what model is it?
It could also be a faulty USB modem, you could open it up and verify everything looks OK inside.
Is the modem cable wired correctly, maybe the voltage is on the wrong line? (Not sure if this actually matters.)
Have you checked the logs (in /var/log) on the Raspberry? It might very well be that it’s seeing something, might give you a hint.
Maybe the Dreamcast modem could be broken?
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