HP HSR6800 Router Fiber cable overview, Item, Figure, CAUTION:, Period of force, Tensile load (N), Crush load (N/mm), Multi-modeoptical fiber, Single-modeoptical fiber

Figure 33 SFP+ transceiver moduleFiber cable overview

CAUTION:

•Never exert a fierce force when you insert or remove a fiber connector.•Never pull, press or extrude the fiber fiercely.

Optical fibers can be classified into single-mode optical fibers and multi-mode optical fibers. A single-mode optical fiber carries only a single ray of light, and a multi-mode optical fiber carries multiple modes of lights.

Table 9 Characteristics of single-mode and multi-mode optical fibers

Item Single-mode optical fiber Multi-mode optical fiber

Core Small core (10 micrometers or less)

Larger core than single-mode optical fiber (50 micrometers, 62.5 micrometers or greater)

Dispersion	Less dispersion	Allows greater dispersion and
		therefore, signal loss exists
	Users lasers as the light source often	Uses LEDs as the light source often
Light source and transmission		within LANs or distances of a
	within campus backbones for distance
distance		couple hundred meters within a
	of several thousand meters
		campus network

Table 10 lists the allowed maximum tensile load and crush load for the fiber.Table 10 Allowed maximum tensile force and crush load

Period of force	Tensile load (N)	Crush load (N/mm)
Short period	150	500
Long term	80	100

Fiber connectors are indispensable passive components in an optical fiber communication system. They allow the removable connection between optical channels, which makes the optical system debugging and maintenance more convenient. There are multiple types of fiber connectors. Figure 34 shows an LC connector. Fiber ports of the HP HSR6800 routers support only LC connectors.

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