Just had a very weird problem with our nearly brand-new (less than 1 months old) SF 200-24P 24-Port PoE Smart Switch. We are using this switch for 9 IP phones. It has been working fine for just over a week, and now 7 of that 9 phones all of sudden lost the network connection to the server, but all of them still have power.
We have done both soft and hard restart for the switch, still the same result. Strange enough, if we try to plug one of the 'not working phone' to the port of the working one, then it works straight away.
It looks very likely to be a hardware issue there, but as it is a brand new switch, we also suspect it might be some kind of software 'locking' on those ports, not entirely sure.
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