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D-Link DGS-1008D Unmanaged Gigabit Ethernet Switch
Front-Panel Components
The front panel of the Switch consists of LED indicators, 8(10/100/1000 Mbps) Ethernet ports.
Figure 1-1. Front Panel View of the switch
Comprehensive LED indicators display the status of the switch and the network.
LED Indicators
The LED indicators of the Switch include Power, 100/1000Mbps and Link/Act. The following shows the LED
indicators for the Switch along with an explanation of each indicator.
Figure 1-1. LED Indicators
LED Indicators
Comprehensive LED indicators display the conditions of the Switch and status of the network. A description of these LED indicators
follows (see LED Indicators). The LED indicators of the Switch include Power, Link/Act, 1000Mbps and 100Mbps.
Power Indicator
This green indicator illuminates when the Switch is receiving power.
Link / Act
This green indicator illuminates steadily when a port is connected to a station successfully and has
a good link. The indicator will blink to indicate that a port is transmitting or receiving data on the
network.
Speed — 100Mbps/amber; 1000Mbps/green; 10Mbps/off
This indicator is amber-colored when the port is connected to a 100Mbps Fast Ethernet station. It is
green when the port is connected to a 1000Mbps Ethernet station. It is not illuminated when the
port is connected to a 10Mbps Ethernet station.
Cable Diagnostic − LED Indications
When the Switch is booted, the Cable Diagnostic function is initialized and run. The Cable
Diagnostic function will detect three common faults in an Ethernet cable connecting the Switch to a
remote network device: an open circuit (a lack of continuity between the pins at each end of the
Ethernet cable or a disconnected cable), a short circuit (two or more conductors short-circuited),
and improper termination (a termination resistance greater than the specified 100 ohms). Any of
these common cable faults will be detected by the Cable Diagnostic function and the LEDs will
display the results of the Cable Diagnostic function as follows:
Open, Short, or Improper Termination − Speed LED: Amber − Link/Act LED: Off
Cable connection good − Speed LED: Green − Link/Act LED: Off
The Cable Diagnostic function operates only during the Switch boot (when the Switch is first
powered on.)
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