Intel Desktop Board DH55HC Product Guide
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Figure 2. LAN Connector LEDs
Table 3. LAN Connector LEDs
LED LED Color LED State Indicates
A (Link/Activity) Off LAN link is not established
Green
On LAN link is established
Blinking LAN activity is occurring
N/A Off 10 Mb/s data rate
Green On 100 Mb/s data rate
B (Link Speed)
Yellow On 1000 Mb/s data rate
USB 2.0 Support
The board supports up to twelve USB 2.0 ports provided by two EHCI host controllers
in the PCH that allow the use of EHCI-compatible drivers.
The port arrangement is as follows:
• Six ports via stacked back panel connectors
• Six front panel ports via three dual-port internal headers; one header supports an
Intel Z-U130 USB Solid-State Drive (or compatible device)
USB 2.0 support requires both an operating system and drivers that fully support
USB 2.0 transfer rates.
Serial ATA Support
The board provides six internal SATA connectors through the PCH, four for internal
storage (black connectors) and two for internal as well as external SATA (eSATA)
storage (red connectors).
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