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TROUBLESHOOTING 
 
 

 

Incorrect Connections 

Every port on this switch can automatically detect either straight or crossover cables when you link it with 
other Ethernet devices but other devices may demand a specific cable type depending on the device. Choose 
the appropriate cable to connect between the units. The RJ-45 connector should use correct UTP or STP cable, 
10/100Mbps port use 2-pairs twisted cable. If the RJ-45 connector is not correctly pinned then the link will fail. 
 

 

Faulty or Loose Cables 

Look for loose or faulty connections.  If they appear to be OK, then make sure the connections are snug.  If 
that does not correct problem, try a different cable 
 

 

Non-Standard Cables 

Non-standard and mis-wired cables may cause numerous network collisions and other network problems, and 
can seriously impair network performance. A cable tester is the recommended tool for any proper network 
installation. 
 

 

RJ-45 Ports 

Use unshielded twisted-pair (UTP) or shield twisted-pair (STP) cable for 
RJ-45 connections: 100Ω Category 3, 4 or 5 cable for 10Mbps connections, 100Ω 
Category 5 cable for 100Mpbs connections, or 100Ω Category 5e/above cable for 
1000Mbps connections.  Also be sure that length of any twisted-pair connection does not exceed 100 meters 
(328 feet). We suggest using Category 5e cable when connection to power a device. 
 

 

Improper Network Topologies 

It is important to make sure that you have a valid network topology. Common topology faults include 
excessive cable length and too many repeaters (hubs) between end nodes. In addition, you should make sure 
that your network topology contains no data path loops. Between any two ends nodes, there should be only 
one active cabling path at any time. Data path loops will cause broadcast storms that will severely impact your 
network performance. 
 
 

 

Diagnosing LED Indicators 

To assist in identifying problems, the switch can be easily monitored through panel indicators, which describe 
common problems the user may encounter and where the user can find possible solutions. If the LED display 
detection isn’t correct, please unplug then plug in the cable again. If the power indicator does not light when 
the power cord in plugged in, you may have a problem with the power outlet or power connections, power 
losses, or surges at power outlet. If the problem still cannot be resolved, please contact the local dealer for 
assistance. 

 
 
 
 
 
 

Summary of Contents for P3POE8-30

Page 1: ...power The current is transmitted over two of the four twisted pairs of wires in a Category 5 cable Power over Ethernet follows the IEEE 802 3af at specification and is completely compatible with existing Ethernet switches and networked devices Because the Power Sourcing Equipment PSE tests whether a networked device is PoE capable power is never transmitted unless a Powered Device is at the other ...

Page 2: ... indicators RJ 45 Ports Auto MDI MDIX This product features Auto sensing ports of 10 100 N way for 10Base T or 100Base TX connections In general MDI means connecting to another Hub or Switch while MDIX means connecting to a workstation or PC Therefore Auto MDI MDIX means that you can connect to another Switch or workstation without changing pin to pin or crossover cabling All of these ports can su...

Page 3: ... of networked topology which are used PoE switch is designed as a segment switch that has a large address table and high performance to deal with interconnecting networking segments PC workstations and servers can communicate with each other by directly connecting with the PoE switch The switch automatically learns nodes addresses which are subsequently used to filter and forward all traffic based...

Page 4: ...00Mpbs connections or 100Ω Category 5e above cable for 1000Mbps connections Also be sure that length of any twisted pair connection does not exceed 100 meters 328 feet We suggest using Category 5e cable when connection to power a device Improper Network Topologies It is important to make sure that you have a valid network topology Common topology faults include excessive cable length and too many ...

Page 5: ...C 45 C Operating Humidity 10 90 Non Condensing Power Supply Built in Power Supply Input AC100 240VAC 50 60 Hz Power Consumption 250W EMI FCC Class B CE FCC STATEMENT This equipment has been tested and found to comply with the limits with a Class B device pursuant to part 15 of the FCC rules These limits are designed to provide reasonable protection against harmful interference in a commercial inst...

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