H3C Technologies H3C S12500-X Series Switches - Manual (Page 131)

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• 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.
• 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 fiber port.
• 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 dust caps).
• 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.
• Insert and remove a plug with care. Never exert a fierce force to the fiber or plug; otherwise the
plug might be damaged or the fiber might be broken. Never pull, press or extrude the fiber fiercely.
For the allowed maximum tensile load and crush load, see Table 70 .
SFP+ DAC cable
You can use SFP+ DAC cables to connect the SFP+ ports. The SFP+ DAC cables available for the switch
series are 10 G SFP+ Cu cables, as shown in Figure 72 .
Figure 72 SFP+ DAC cable
(1) Connector (2) Pull latch
QSFP+ DAC cable
You can use QSFP+ DAC cables to connect the QSFP+ ports.
1 2