Common Faults Caused by Incorrect Installation
The most common source of contaminants in the optical bores is debris picked up on the ferrules of the optical connectors. Using an alcohol swab or lint-free absorbent wipes to clean the ferrules of the optical connector is very necessary. Figure 1 shows the comparison between a normal fiber optic transceiver and a contaminated transceiver. Figure 1 and figure 2 in the following show us the common case of this situation. You can clearly see the white contamination with naked eyes through the comparison of the normal and fault transceiver in figure 1 while figure 2 shows us the phenomenon that the ferrule of optical connectors in the ends of fiber patch cord breaks in the port and make the module fault.
Figure 1. The comparison of the normal and fault transceiver
figure 2 The ferrule of optical connectors is broken in the module
In addition, using contaminated fiber patch cord or shoddy fiber patch cord, eventually leads the port of fiber transceiver module to be contaminated.
Figure 3. Ferrule of fiber optic connector
2. Absence of Conductive Metal
In general, the conductive metal are of a normal and good quality fiber optic transceiver module is glossy. Look at the figure 4, they are both the faulty modules. The left one is lack of conductive metal, while the right is old and not glossy.
Figure 4. Absence of conductive metal
3. The Fiber Transceiver Module Is Not Plugged Tightly, Resulting In Optical Signal Transmission Restrictions
When plugged into devices, fiber optic transceiver module must be tightly plugged and the bail clasp must be in place. Otherwise it will easily be interrupted or loosed when there are vibration and impact on the device. The figure 5 shows us the wrong insert-mode.
Figure 5. Wrong insert-mode
Tips For Proper Installation
1. Careful Check Before Installation
Figure 6. Conductive metal of a good transceiver module
Figure 7. Comparison of good bail clasp and damaged bail clasp
Figure 8. A clean port surface
2. How To Install The Fiber Optic Transceiver Into A Device
Note: Do not remove the dust plug from the transceiver slot if you are not installing the transceiver at this time. The dust plug protects the line card from dust contamination. The dust plug protects the fiber optic port on the transceiver from dust contamination. It should not be removed until you are ready to connect the fiber optic cable.
3. Installation & Removal Of Fiber Optic Patch Cord
Figure 9. Fiber optic cord Installation
Note: The connector of fiber optic patch cord must install dust caps before plugging into the module. Otherwise it will easily lead to optical modules to be contaminated when it connect to the module. (Figure 10)
Figure 10. Connector of fiber optic patch cord must install dust caps when it is unused
In addition, when you need to remove the fiber optic transceiver module, you should remove the fiber patch cord first. To be remembered, you should not remove the modules until removing the bail clasp. The correct way to remove module is to loose the bail clasp first and then remove the module through pulling the bail clasp. (Figure 11-12)
Figure 11. Removal of fiber optic patch cord
Figure 12. Removal of fiber optic transceiver module
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