Download for DGS-3120-48PC Manual: How to access switch interface How to change poe settings How to change switch’s ip address How to enable loopback detection How to enable VLAN on switch How to set LACP(Link Aggregation) How to set RSTP on switch How to upgrade switch firmware Download Firmware: 3.10.012 Hardware: A1/A2 Download Firmware: 4.00.015 Hardware: B1