Four steps to discover the failure of the optical community

 Look at Indicator of fiber-optic transceiver or optical module and the twisted pair port indicator is vibrant or no longer?

A ,which include the optical transceiver port (FX) indicator does now not mild, make sure that the fiber link is cross-connected? Fiber jumper is a parallel connection; the other end of the move-connect.
B, A transceiver optical port (FX) mild, B transceiver optical port (FX) indicator is not lit, the fault in the transceiver A-side: One possibility is that: the optical transmitter of the transceiver (TX)the mouth is horrific, because the receiving optical alerts B transceiver optical port (RX); Another opportunity is: A transceiver (TX) port optical transmitter fiber link troubles (cable or light jumper may off).
C,twisted pair (TP) indicator isn't lit, ensure the twisted pair connection is wrong or linked incorrect? Off tester checks; (However, some twisted pair transceiver indicator will be fiber link related after the bright)
d, the transceiver has  RJ45 ports: (To HUB) cable connected to the transfer is a right away line; (To Node) related to the switch of the cable is a crossover cable;
e, a few hair aspect of the MPR transfer: transfer connection cable is a directly-line; DTE switch: transfer connection cable is a cross-line.

(2) fiber optic cable, fiber patch cable is off?
A fiber optic cable through the off detection: laser flashlight, the solar, the luminous body facing the cable connector or a coupling according to the light; at the alternative give up to look if there are seen?If visible light shows that the fiber optic cable isn't broken.
B, optical fiber connection off detection: laser flashlight, the solar, dealing with the fiber jumper, a phototherapy; see if there are visible at the alternative give up? If visible mild shows that the fiber jumper isn't always broken.
Half / complete duplex way is inaccurate?
Some transceiver side of the FDX switch: shows complete-duplex; HDX transfer: that half-duplex.
With Optical Power Meter instrumentation
Under normal occasions, the luminous electricity of fiber-optic transceiver or optical module: Multi-mode:-10db-18db among; 20 km single-mode:-8dB between-15db; 60 km unmarried-mode:-5db-12db between; the luminous power of the fiber optic transceiver:-30db-5db between, you could decide this transceiver. If you want to know greater, you may go to 10Gtek.