Evaluating and Meeting Cable Requirements

Fiber Optic Cable

Fiber optic cable must be handled carefully during installation. Every cable has a minimum bend radius, for example, and fibers will be damaged if the cables are bent too sharply. It is also important not to stretch the cable during installation. We recommend that the bend radius for fiber optic cable equal 2 inches (5.08 cm) minimum for each 90 degree turn as shown in Figure 32.

NOTE

Kinks and sharp bends can destroy or impair the cable’s ability to convey light pulses accurately from one end of the cable to the other. Use care in dressing the optical fiber cables: provide satisfactory strain relief to support the cable and maintain an adequate bend radius at all cable turns, particularly where the cable connects to the I/O module.

Figure 32: Bend Radius for Fiber Optic Cable

Minimum

2-in. (5.08-cm)

radius

in 90∞ bend

90∞

Optical fiber cable

SPG_002

Cable Distances

Table 12 shows cable media types and maximum distances that support reliable transmission in accordance with international standards, except where noted.

Table 12: Media Types and Maximum Distances

 

 

Mhz•Km

Maximum Distance

Standard

Media Type

Rating

(Meters)

 

 

 

 

1000BASE-SX

50/125 μm multimode fiber

400

500

(850 nm optical

50/125 μm multimode fiber

500

550

window)

62.5/125 μm multimode fiber

160

220

 

 

62.5/125 μm multimode fiber

200

275

1000BASE-LX

50/125 μm multimode fiber

400

550

(1300 nm optical

50/125 μm multimode fiber

500

550

window)

62.5/125 μm multimode fiber

500

550

 

 

10/125 μm single-mode fiber

5,000

 

10/125 μm single-mode fiber*

10,000

1000BASE-LX70

10/125 μm single-mode fiber

70,000

(1550 nm optical

 

 

 

window)

 

 

 

 

 

 

 

BlackDiamond 8800 Series Switches Hardware Installation Guide

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Extreme Networks 8800 Series manual Fiber Optic Cable, Cable Distances, Media Types and Maximum Distances

8800 Series specifications

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