How to Judge Whether the Fiber Optic Media Converter has Quality Problem?

Key words: Fiber optical media converter, industrial media converter, optical transceiver module, fiber optical cables, fiber optical jumpers

 

In general, the optical power of fiber media converter or optical modules is as following: multi-mode is between -10db ~ -18db; single-mode 20 kilometers is between -8db ~ -15db; and single-mode 60 kilometers is between -5db ~ -12db between. But if the optical power of the fiber media converter is between -30db ~ -45db, then it seems that there is a quality problem with the fiber optic transceiver. So, how to judge whether there is a quality problem with the fiber media converter?

 

First, check whether the indicator light of the optical fibermedia converter and opticaltransceivermodule and the indicator light of the twisted pair port are on

 

a. If the optical port (FX) indicator light of the optical media converter is off, please make sure whether the optical fiber link is cross-linked? One end of the fiber jumper is connected in parallel; the other end is connected in cross mode.

 

b. If the optical port (FX) indicator light of the fiber A media converter is on and the optical port (FX) indicator light of the B fiber media converter is off, the fault is at the A fiber media converter. A possibility is that the optical transmitting port of the A fiber media converter (TX) is broken because the optical port (RX) of the B fiber media converter cannot receive optical signals; another possibility is that the optical fiber link of the optical transmitting port of the A fiber media converter (TX) has a problem (optical cable or fiber jumper may be broken)

 

c. If the Twisted Pair (TP) indicator light is off. Please make sure whether the twisted pair connecting line is wrong or the connection is wrong? Please use a continuity tester to test (but the twisted-pair indicator light of some fiber media converter will only turn on after the fiber link is connected).

 

d. Some fiber media converter have two RJ45 ports: (ToHUB) indicates that the cable connecting the switch is a straight-through line; (ToNode) indicates that the cable connecting the switch is a crossover line.

 

e. There is an MPR optical switch on the side of some fiber media converters which means that the connection line to the switch is a straight-through line. And the DTE optical switch is means that the connection line to the switch is a crossover line.

 

Whether the fiber optic cable and fiber jumper are broken

 

a. Fiber optical cable broken test: using a fiber optical laser tester to test one end of the optical cable connector or coupler, and watching if there is visible light at the other end. If there is visible light, it indicates that the optical cable is not broken.

 

b. Optical fiber jumper broken test: using a Visual Fault Locator test one end of the fiber jumper, and watching if there is visible light at the other end. If there is visible light, it indicates that the fiber jumper is not broken.

 

Is the half/full duplex mode wrong?

 

There is an FDX optical switch on the side of some media converters. It means full duplex; HDX optical switch means half duplex.

 

4. Detect with optical power meter

 

The optical power of the optical fiber media converter or optical tranceiver module under normal conditions is between -10db ~ -18db for multimode; between -8db ~ -15db for single mode 20 km; between -5db ~ -12db for single mode 60 km. If the optical power of the fiber media converter is between -30db ~ 45db, then it can be judged that the fiber media converter is with quality problem.

 

The above is the relevant introduction on how to judge whether there is a problem on optical fiber media converter. As the optical fiber market continues to mature, the application field of optical fiber becomes more and more extensive. With the widespread use of optical fiber, it is natural that there will be failures. But as long as we find out the cause and solve it accordingly!