Edge-Core ECS3510-28F, Руководство по установке, Страница: 32 / 72

C
HAPTER
2
| Network Planning
Application Notes
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A
PPLICATION
N
OTES
1.
Full-duplex operation only applies to point-to-point access (such as when a
switch is attached to a workstation, server or another switch). When the
switch is connected to a hub, both devices must operate in half-duplex
mode.
2.
Avoid using flow control on a port connected to a hub unless it is actually
required to solve a problem. Otherwise back pressure jamming signals may
degrade overall performance for the segment attached to the hub.
3.
Based on recommended standards, the length of fiber optic cable for a
single switched link should not exceed:
■
1000BASE-SX: 550 m (1805 ft) for multimode fiber.
■
1000BASE-LX: 10 km (6.2 miles) for single-mode fiber.
■
1000BASE-LH: 80 km (49.7 miles) for single-mode fiber.
■
1000BASE-LHX: 40 km (24.8 miles) for single-mode fiber.
■
1000BASE-ZX: 100 km (62 miles) for single-mode fiber.
■
1000BASE-BX20: 20 km (12.4 miles) for single-mode fiber.
■
1000BASE-BX10: 10 km (6.2 miles) for single-mode fiber.
However, power budget constraints must also be considered when
calculating the maximum cable length for your specific environment.