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ioc.exchange is one of the many independent Mastodon servers you can use to participate in the fediverse.
INDICATORS OF COMPROMISE (IOC) InfoSec Community within the Fediverse. Newbies, experts, gurus - Everyone is Welcome! Instance is supposed to be fast and secure.

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Graham Sutherland / Polynomial

why must PoE circuits be hellishly complicated and high BOM count? it's such a perfect way to do stage lighting since most fixtures in small venues don't need more than 70W and you can run ArtNet directly to them.

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Andrew Zonenberg

@whitequark @gsuberland Sooo funny thing... just yesterday I helped a friend troubleshoot a truly cursed problem.

Scenario: IP camera supports both PoE and DC barrel jack power + standard ethernet connections.

Camera + PoE switch A: works fine
Camera + non-PoE switch B + wallwart: works fine
Camera + non-PoE switch C + wallwart: instantly shuts off as soon as cable is mated

Quiet public *
Andrew Zonenberg

@whitequark @gsuberland Any guesses as to what the root cause was (yes, it was hardware) and how she fixed it?

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hufman
@azonenberg @whitequark @gsuberland Is it perchance trying to sink a dumb PoE protocol that doesn't negotiate but instead shorts some of the wires that aren't used in 1gb ethernet? And she fixed it by using a 100mb cable?
Or something like that maybe...
Andrew Zonenberg

@hufman @gsuberland @whitequark On the right track but it ended up working at gig in the end.

Feb 11, 2025, 05:05 PM·Quiet public·Web
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