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6. Troubleshooting
This chapter contains information to help you solve problems. If the Switch is
not functioning properly, make sure the Ethernet Switch was set up according to
instructions in this manual.
The Link LED is not lit
Solution:
Check the cable connection and remove duplex mode of the Switch.
Performance is bad
Solution:
Check the full duplex status of the Switch. If the Ethernet Switch is set to full
duplex and the partner is set to half duplex, then the performance will be poor.
100BASE-TX port link LED is lit, but the trafc is irregular
Solution:
Check that the attached device is not set to dedicate full duplex. Some devices use
a physical or software switch to change duplex modes. Auto-negotiation may not
recognizethistypeoffull-duplexsetting.
Why the Switch doesn’t connect to the network
Solution:
1. Check the LNK/ACT LED on the switch.
2. Try another port on the Switch.
3. Make sure the cable is installed properly.
4. Make sure the cable is the right type.
5. Turn off the power. After a while, turn on power again.
Why it cannot be powered on after connecting PoE device to GSD-808HP
Solution:
Please check what cable type is used for connecting the GSD-808HP (port 1 to port
8) to the other end. The cable should be an 8-wire UTP, Category 5 or above, and
EIA568 cable within 100 meters. A cable with only 4-wire, short loop or over 100
meters will affect the power supply.
Please make sure the device is fully complied with IEEE 802.3af/at standard.
What is the power output of each PoE port?
Solution:
1. Each PoE port supports 52V DC, 535mA, and a maximum power output of 30
watts, which are detected and injected by the standard of IEEE 802.3at.
2. Each PoE port supports 52V DC, 275mA, and a maximum power output of
15.4 watts, which are detected and injected by the standard of IEEE 802.3af.