3-18
Figure 3-18
LC connector
Precautions
z
Be sure to install the dust cover if the optical port is not connected to a fiber connector.
z
Some invisible rays may be emitted from the optical port if the optical port is not connected to a
fiber connector or the dust cover is removed. Therefore, never stare at the optical port directly.
z
Fiber connectors must be protected under safe and reliable outer packing, and be fitted with dust
caps. Fiber connectors must be installed with dust caps when they are not in use. Take care not to
scratch their end face. Replace the dust cap if it is loose or polluted.
z
Before connecting a fiber, use dust free paper and absolute alcohol to clean the end face of the
fiber connector. You can brush the end face only in one direction. You also need to brush the end
face of the other fiber connector.
z
Never bend or curve a fiber when connecting it. After a fiber is installed well, the bend radius must
be not less than 40 mm (the minimum dynamic bend radius is 20 D, and the minimum static bend
radius is 10 D. D indicates the outer diameter of fiber jackets).
z
If the fiber has to pass through a metallic board hole, the hole must have a sleek and fully filleted
surface (the filleting radius must be not less than 2 mm). When passing through a metallic board
hole or bending along the acute side of mechanical parts, the fiber must wear jackets or cushions.
z
Insert and remove a plug with care. Never exert a fierce force to the fiber or plug; otherwise the plug
may be damaged or the fiber may be broken. Never pull, press or extrude the fiber fiercely. For the
allowed maximum tensile load and crush load, refer to Table 3-3.
Table 3-3
Allowed maximum tensile force and crush load
Period of force
Tensile load (N)
Crush load (N/100 mm)
Short period
150 500
Long term
80 100
Connection procedures
Step1
Connect one end of the fiber to the SFP module of the S12500 series.
Step2
Connect the other end of the fiber to the peer device.
Connecting Power Cables
Prerequisites
z
For lightning protection, the AC power should be led through an external lightning device into
S12500 series switches.
z
Make sure the power switch on the power frame is in the OFF position.
