Phy

Table 10. 450-1LR and 450-1LX MDA Description

Item	Label	Description

1	Link	Communication link LEDs (green):
		On: Valid communications link.
		Off: The communications link
		connection is bad or there is no
		connection to this port.
		Blinking: The corresponding port is
		management disabled.
2	PHY	Phy status LEDs (green):
	(or)
	Phy Select
		On: The corresponding Phy port is
		active.
		Off: The corresponding Phy port is in
		backup mode or there is no connection
		to this port.
3	Activity	Port activity LEDs (green):
		Blinking: Indicates network activity
		level for the corresponding port. A high
		level of network activity can cause
		LEDs to appear to be on continuously.
4		1000BASE-X SC port connectors (see
		“1000BASE-LX Multimode Applications” on
		page 42 for special requirements).