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Common faults and elimination methods in optical fiber network

- Mar 19, 2018 -

What faults and troubleshooting methods are common in optical fiber networks: the light of the optical fiber transceiver or the optical fiber module and the light of the twisted pair port


As the optical transceiver (FX) indicator light does not shine, please confirm whether the fiber link cross link; a fiber jumper is parallel connected; the other end is connected with the cross. Such as the A transceiver interface (FX) indicator lights, B optical transceiver (FX) indicator light does not shine, then the fault in the A transceiver: one possibility is: A transceiver (TX) optical transmission has been bad, because the B transceiver interface (RX) to receive the optical signal; another may be: A transceiver (TX) of the optical fiber link to send port problems (cable or light jumpers might be broken).


The twisted pair (TP) indicator light is not bright. Please determine whether the twisted pair wire is wrong or the connection is incorrect. Please use the on-off tester; some transceiver has two RJ45 ports: (To HUB) said the connection line between the switches is straight line; (To Node) said the connection line between the switches is cross; some generator side MPR switch: switch is connected through line; DTE switch: switch is connected to cross line.


What fault and elimination methods are common in optical fiber network two, detection by optical power meter instrument


Optical transceiver or optical module under normal conditions of light power: -10db--18db; single mode multimode: 20 km: -8db--15db; -5db--12db; 60 km single mode: if the light output power of optical transceiver in -30db--45db, you can judge the transceiver.


What faults and troubleshooting methods are common in optical fiber network three, half / full duplex mode is wrong


There are FDX switches on the side of some transceivers: full duplex; HDX switch: half duplex.

What faults and troubleshooting methods are common in optical fiber network four, whether optical fiber cable and fiber jump line have been broken


A, optical fiber on-off detection: use laser flashlight, sunlight and luminous body to illuminate the cable connector or one of the couplings, and see if there is visible light on the other side. If visible light indicates that the optical cable is not broken.

B and optical fiber connection break detection: use laser flashlight and sunlight to illuminate the first part of the optical fiber jumper, and see if there is visible light at the other end. If visible light shows that the optical fiber jumper is not broken.


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