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1-18 System Overview
Network Controller
NOTE:
To ensure EMC product regulation compliance, the system must be
used with a shielded LAN cable.
The server board uses two Intel ® 82550PM Fast Ethernet Controllers and supports two 10Base-
T/100Base-TX network subsystems.
The 82550 PM controller supports the following features:
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32-bit PCI, CardBus master interface
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Integrated IEEE 802.3 10Base-T and 100Base-TX compatible PHY
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IEEE 820.3u auto-negotiation support
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Chained memory structure similar to the 82559, 82558, 82557 and 82596
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Full duplex support at both 10 Mbps and 100 Mbps operation
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Low power +3.3 V device
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IP checksum off-loading
On the system board, NIC 1 can be used as both a network interface and server management
interface.
NIC Connector and Status LEDs
The 82550 controller drives LEDs on the network interface connector that indicate link/activity
on the LAN and 10- or 100-Mbps operation. The green LED indicates network connection when
lit and TX/RX activity when blinking. The yellow LED indicates 100-Mbps operation when lit.