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I'm using two sg 300 switch (Fw 1.1.1.8) and I configured vlans for data and phone.

Enabling voice lan, dynamic voice vlan, the option Enable Thelephon OUI is grayed.

I think that this is related to LLDP and CDP setting's, but I'm not able to discovery how.

How to enable thelephon OUI? where more info?.

Thanks,

Fabrizio