HP Compaq NC3123 Fast Ethernet NIC PCI Adapter - Manual (Page 11)

Introduction 1-3
LED Indicators
The Compaq NC3123 Server Adapter has LED indicators for link, activity, and speed (10 or
100 Mb/s), as described in the following table.
Table 1-1
NC3123 Server Adapter LED Indicators
LED Status Description
LNK On The NC3123 adapter and hub or switch are receiving power. The cable
connection is good.
Off The NC3123 adapter and hub or switch are not receiving power. The cable
connection between the adapter and hub or switch is faulty.
On or flashing The NC3123 adapter is receiving direct packets or broadcast packets for this
specific adapter. When sending packets, the ACT light is also active due to
network acknowledgments being received.
ACT
Off The NC3123 adapter is not receiving direct packets or broadcast packets.
On The NC3123 adapter is operating at 100 Mb/s. 100
Mb/s
Off The NC3123 adapter is operating at 10 Mb/s.
Wake on LAN
For the Wake on LAN (WOL) feature to operate properly, the NC3123 Server Adapter must be
connected to a continuous power source. This allows the adapter to listen to the network even
when the computer is powered off.
The WOL feature lets designers build adapters that can “listen to” network activity even when
the computer is powered off. WOL adapters have a special low-power standby mode that is
active when the rest of the computer is without power. The adapter will respond to a special
“wake-up” packet sent by another computer or network device. Typically this wake-up packet
causes the adapter to signal the computer to power up.
See “Connecting the Wake on LAN (WOL) Power Cable” in Chapter 2.