Extreme Networks Alpine 3802, Руководство по установке оборудования, Страница: 47 / 394

Evaluating and Meeting Cable Requirements
Extreme Networks Consolidated "i" and "e" Series Hardware Installation Guide 47
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 12: Bend radius for fiber optic cable
Cable Distances
Table 6 shows cable media types and maximum distances that support reliable transmission in
accordance with international standards except where noted.
Table 6: Media types and maximum distances
Standard Media Type
Mhz•Km
Rating Maximum Distance
(Meters)
1000BASE-SX
(850 nm optical
window) 50/125 µm multimode fiber
50/125 µm multimode fiber
62.5/125 µm multimode fiber
62.5/125 µm multimode fiber
400
500
160
200
500
550
220
275
1000BASE-LX
(1300 nm optical
window) 50/125 µm multimode fiber
50/125 µm multimode fiber
62.5/125 µm multimode fiber
10/125 µm single-mode fiber
10/125 µm single-mode fiber*
400
500
500
–
–
550
550
550
5,000
10,000
1000BASE-LX70
(1550 nm optical
window) 10/125 µm single-mode fiber – 70,000
100BASE-FX
(1300 nm optical
window) 50/125 µm multimode fiber
50/125 µm multimode fiber
62.5/125 µm multimode fiber
62.5/125 µm multimode fiber
400
500
400
500
2000
2000
2000
2000
SPG_002
Minimum
2 in. (5.08cm)
radius
in 90˚ bend
90˚
Optical fiber cable