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D-Link DGS-1005D Unmanaged Gigabit Ethernet Switch
LED Indicators
The LED indicators of the Switch include Power, and Link/Act/Speed. The following shows the LED indicators for the
Switch along with an explanation of each indicator.
Figure 1-2. 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/Speed. The
Cable Diagnostics functions of the Switch are indicated by Link/Act/Speed LED, as described below.
Power Indicator
This green indicator light is on when the Switch is receiving power; otherwise, it is off.
Link/Act/Speed
When connected to a 1000Mbps device, this LED indicator light is green when the port is connected to a
device and will blink as data is transmitted or received.
When connected to a 10/100Mbps device, this LED indicator light is amber when the port is connected to a
device and will blink as data is transmitted or received.
Cable Diagnostics LED Indications
When the Switch is booted up (when the Switch is first powered on), the Cable Diagnostics function is
initialized and run. The Cable Diagnostics 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 Diagnostics function and the LEDs will display the
results of the Cable Diagnostics function.
The Cable Diagnostics first scans the 5 / 8 Ethernet ports to determine if the Ethernet cable is in good
working order. This process is indicated by the Link/Act/Speed LED blinking green for each of the 5 / 8 ports
sequentially. If a cable fault is detected, it is indicated by the corresponding port’s Link/Act/Speed LED
glowing amber after the initial port scan. If the cable connection is good, the corresponding port’s
Link/Act/Speed LED will glowing green. After the display of cable status, the Switch is then reset for normal
operation.
Note: There is no display of cable faults detected by the Cable Diagnostics during the normal operation of the
Switch, only when the Switch is booted up or power-cycled.