IBM 86655RY - Netfinity 7600 - 8665 Hardware Maintenance Manual page 20

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Hardware Maintenance Manual: Netfinity 7600 – Type 8665 Models 1RY, 2RY
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Ethernet transmit/receive activity light: When this green light is on, there is
activity between the server from the network.
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Ethernet-link status light: When this green light is on, there is an active
connection on the Ethernet port.
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Ethernet speed 100 Mbps: When this green light is on, the Ethernet speed is
100 Mbps. When the light is off, the Ethernet speed is 10 Mbps.
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Processor activity lights: One or more of these green lights are on when there
is microprocessor activity. The number of lights that are on indicates the
number of microprocessors with activity.