KTI Networks KS-324F - Manual (Page 12)

disable the backpressure function for half duplex. If it is enable, it can
prevent packets lost in half duplex mode. But it will also reject packets when
the network traffic is very heavy and that may cause some network
connections fail.
2. Port Setting :
You can set the operation speed, duplex mode from here. If
"Auto_Negotiation" is enable, the settings in speed and duplex will be ignored.
If "Auto_Negotiation" is disable, the speed and duplex setting will take effect.
3. VLAN Setting :