Appendix
MP1900X Series Router Installation Manual
D-6
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only and you also need to wipe the surface of the peer fiber connector.
When connecting, you cannot twist or bend the fiber. After installation, the bent
radius of the fiber cannot be smaller than 40 mm (In dynamic bending case, the
minimum bend radius is 20 D; in the static bending case, the minimum bend radius
is 10 D; D is the fiber sheath diameter).
If the fiber needs to pass through the metal board hole when connecting, the metal
board hole should have the smooth and fully rounded surface (the rounded radius
should be no less than 2 mm). When passing through the metal board hole and
turning along the sharp edge of the structural part, we should add the protective
sleeve or pad.
Be careful when plugging the connector and avoid damaging the connector or
fracturing the fiber because of too much force. Avoid pulling, pressing, and
extruding the fiber. The permitted maximum tensile force and crush force of the fiber
are as shown in the following table.
Appendix Table D-6 Permitted force of the fiber
Force Time
Tensile Force (N)
Crush Force (N/100mm)
Short-term force
150
500
Long-term force
80
100
Installation Method of Fiber
After the fiber is drawn out from the optical interface, the fiber directly connected to the
photoelectric converter can be coiled to hang in the inner side of the chassis. The fiber
cascaded with other routers should slip over the PVC pipe to draw out, avoiding
traction and stretching.
Fiber itself does not belong to the conductor, and it does not sense or transduce the
over-voltage, but the strengthen core of the fiber optic cable (the armored
component installed to prevent the fiber from being affected by the environment
event) can easily sense and transduce the lightning overvoltage, so we should treat
properly. It is recommended that the user performs the ground protection at the user
end of the fiber optic cable.
