Intel DZ77BH-55K, Specification, Page: 31 / 100

Product Description
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1.9.2 LAN Subsystem Software
LAN software and drivers are available from Intel’s World Wide Web site.
For information about Refer to
Obtaining LAN software and drivers http://downloadcenter.intel.com
1.9.3 RJ-45 LAN Connector with Integrated LEDs
Two LEDs are built into the RJ-45 LAN connector (shown in Figure 5).
Item Description
A Link LED (green)
B Data Rate LED (green/yellow)
Figure 5. LAN Connectors LED Locations
Table 9 describes the LED states when the board is powered up and the LAN
subsystem is operating.
Table 9. LAN Connector LED States
LED LED Color LED State Condition
Link Green
Off LAN link is not established.
On LAN link is established.
Blinking LAN activity is occurring.
Data Rate Green/Yellow
Off 10 Mb/s data rate is selected.
Green 100 Mb/s data rate is selected.
Yellow 1000 Mb/s data rate is selected.