SMC Networks 1000BASE-X manual Be used if a port is connected to a hub

		PORT MENUS
Parameter	Default	Description
Flow Control	Disabled	Used to enable or disable flow control. Flow
Status		control can eliminate frame loss by “blocking”
		traffic from end stations or segments connected
		directly to the switch when its buffers fill. Back
		pressure is used for half duplex and IEEE 802.3x
		for full duplex. Note that flow control should not
		be used if a port is connected to a hub.

Note: MT-RJ ports operate at 100 Mbps and support full- and half-duplex mode. 100BASE-FX module ports operate at 100 Mbps, full-duplex only. 1000BASE-SX and 1000BASE-LX ports are fixed at 1000 Mbps, but auto-negotiate duplex mode and flow control. 1000BASE-T ports auto-negotiate speed (1000/100/10 Mbps), duplex mode and flow control.

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