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work on nvr but does'nt on switch poe

fernandobh

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Hi everyone, this week i disconnect 2 ip cameras from a switch poe, when a i connected again, theres no working,
even in the switch the poe and ethernets light is off.

but if i connect those cameras directly from nvr it works,
also if i connect power supply and ethernet (just to data) it works,

it only fail when i connected to a switchs, i try with 2 differents switch and i have the same issue.

i reset te cameras and still have the same issue.
i dont know why does not accept poe any more, (in the rj45 connector looks 2 pins are black just 7-8 left-right order)
 
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