128Table 60 Allowed maximum tensile force and crush loadPeriod of force Tensile load (N) Crush load (N/mm)Short period 150 500Long term 80 100Fiber connectors are indispensable passive components in an optical fiber communication system. Theyallow the removable connection between optical channels, which makes the optical system debuggingand maintenance more convenient. There are multiple types of fiber connectors. Figure 95 shows an LCconnector.Figure 95 Appearance of an LC connectorNOTE:Before connecting an optical fiber, make sure that the connector and cable type match the hot swappableinterface module.NOTE:• Some cards of the H3C SR6604/SR6608 router provide shielded covers for the fiber ports (such as SFPports). Before using such fiber ports, remove the shielded covers. Keep the shielded covers properly.When the fiber ports are not in use, install the shielded covers.• Fiber connectors are fitted with dust caps. Keep the dust caps properly when the fiber connectors are inuse. Install dust caps when the fiber connectors are not in use to avoid damage to their end face. Replacethe dust cap if it is loose or polluted.• Before connecting an optical fiber, use dust free paper and absolute alcohol to clean the end face of thetwo fiber connectors. You can brush the end faces only in one direction.• After a fiber is installed well, the bend radius must be not less than 10 cm (3.94 in).• 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, or 0.08 in). When passing through a metallic boardhole 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 plugmay be damaged or the fiber may be broken. Never pull, press or extrude the fiber fiercely. For theallowed maximum tensile load and crush load, see Table 60.E1 interface cableYou can use a 4E1 interface cable to connect the MIM-IMA-4E1/MIM-IMA-8E1 module, and 8E1interface cable to connect the MIM-8E1(75)/MIM-8E1(75)-F module.
