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The 9455XL has two LED indicators on the back of the unit next to the RJ-45 LAN port
(Network connector). The Green LED is a Dual Link/Activity Indicator, and the Yellow LED
is a Speed Indicator. The blinking sequence (or absence) of these LEDs indicates the
condition of the LAN connection.
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Green LED On—Link, but no Activity
Green LED Blinking—Link with Activity
Green LED Off—No Link
Yellow LED On—100Mbps
Yellow LED Off—10Mbps or no Link