1. Check if the PoE adapter
or PoE switch work
2. Check if the PoE port of
CPE is ok
3. Check if Ethernet cable
is loose if Ethernet cable
plugged into PoE port
4. Check if the voltage is
normal, if the socket
has problem if the input
voltage of the PoE
adapter is normal
1. PoE power supply is
not working
2. Some problem in
CPE's PoE port
3. Ethernet cable is
loose, RJ45 port is
wrong power
current/voltage
lower or wrong
1. Adjust the distance,
angle and channel to
decrease latency
2. Check if port isolated to
avoid network virus and
broadcast storm
4. Decrease the access
users.
5. Change use a Cat 5e or
above network cable.
1. Packet Latency
2. Ethernet cable circuit
3. Network virus attack
4. Too much access
users
5. Network Cables type
lower than Cat 5e?
1. Make CPE or PoE
adapter need a ground
connection
2. Running time over
7 days,reboot it
3. After lightning, device
PoE port broken or
unstable better to
deploy lightning
conductor
1. Static electricity
2. Running time too
long
3. Lightning stroke
Device always
dead
Low transmission
Rate
System LED light
off
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