Fiber media converter is an ethernet transmission media conversion unit that exchanges short-distance twisted pair electrical signals and long-distance optical signals. With the fiber media converter, it also provides a cheap solution for users who need to upgrade the system from copper wire to optical fiber, and for users who lack funds, manpower or time. The function of the fiber media converter is to convert the electrical signal we want to send into an optical signal and send it out. At the same time, it can convert the received optical signal into an electrical signal and input it to our receiving end.
Our commonly used fiber media converter have 6 indicator lights. What does each indicator mean? Does all the indicators light up to indicate that the fiber media converter is working normally?
1000M：Lit when the electrical link speed is 1000Mbps.
100M：Lit when the electrical link speed is 100Mbps；Off when the electrical link speed is 10Mbps.
FX Link/ACT：Lit when the fiber port connection with remote device is good；Blinks when data is transmitting.
TX Link/ACT：Lit when the RJ45 connection with remote device is good；Blinks when data is transmitting.
PWR：Lit when DC5V power is on.
FDX：Lit when full-duplex mode is active on SFP.
When the fiber media converter is operating normally, PWR power indicator must be lit, FX-LINK / ACT fiber link indicator, TX-LINK / ACT network link pilot lights steady or flashing, if the LINK / ACT light does not , you should to check whether the corresponding link is connected normally.
Judgment methods for common faults of fiber media converter
There are many types of fiber media converter, but the fault judgment method is basically the same. To sum up, the faults of fiber media converter are as follows,
1、 Power light off
● Power failure
2、The link light of the optical path off，the fault may be as follows
● Check whether the optical fiber line is open.
● Check whether the loss of the optical fiber line is too large, which exceeds the receiving range of the equipment.
● Check whether the optical fiber interface is correctly connected, the local TX is connected to the remote RX, and the remote TX is connected to the local RX.
● Check whether the optical fiber connector is properly inserted into the device interface, whether the jumper type matches the device interface, whether the device type matches the optical fiber, and whether the transmission length of the device matches the distance.
3、The circuit Link light off，the fault may be as follows
● Check whether the network cable is open
● Check whether the connection type matches, use crossover cables for network cards and routers, and use straight-through cables for switches and hubs.
● Check whether the transmission rate of the device matches.
4、Severe network packet loss，the possible faults are as follows
● The electrical port of fiber media converter and the network device interface, or the duplex mode of the device interface at both ends do not match.
● Check whether there is a problem with the twisted pair cable and the RJ45 interface.
● The fiber connection problem, whether the jumper is aligned with the device interface, whether the pigtail is matched with the jumper and the coupler type, etc.
5、The two ends cannot communicate after the fiber media converter is connected
● The fiber is connected upside down, the fiber connected to TX and TR are swapped
● The connection between the RJ45 interface and the external device is incorrect (pay attention to straight-through and twisted connection).The optical fiber interface (ceramic ferrule) does not match. This fault is mainly reflected in the 100M transceiver with photoelectric mutual control function. If the pigtail of the APC ferrule is connected to the transceiver of the PC ferrule, it will not communicate normally, but it is not connected. The photoelectric mutual control transceiver has no effect.
6、Fiber media converter test method
If you find a problem with fiber media converter connection, please test according to the following methods to find out the cause of the failure
● Near-end test . If the computers at both ends can PING, it is confirmed that there is no problem with fiber media converter. If the near-end test fails to communicate, it can be judged that the fiber media converter is faulty.
● Remote test . Computers at both ends are PING. If PING fails, you must check whether the optical connection is normal and whether the transmit and receive power of the fiber media converter is within the permitted range. If PING is successful, it proves that the optical path is connected normally. It can be judged that the fault is on the switch.
● Remote test to determine the point of failure . at first, connect one end to the switch, and PING at both ends. If there is no end failure, it can be judged as the failure of the other switch.
Tags : fiber media converter, media converter,FTTx,RJ45
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