@Clive_A Hello Clive_A and thank you for your answer The PWR ligth is the only ligth still ON I don't remember if the second power-led is ON too because the second power cable it is not plugged...

Hello Our ER8411 is freezing since a few weeks. I mean, from the network it's like it was be unplugged, and if i look at the front ot the device : SYS led is OFF and all led over RJ45 connectors are...