Edge-Core ES3526VA-PoE, Installation Manual, Page: 32 / 74

Network Planning
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2
Application Notes
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. As a general rule the length of fiber optic cable for a single switched link should
not exceed:
• 1000BASE-SX: 550 m (1805 ft) using multimode fiber
• 1000BASE-LX: 5 km (3.2 miles) using single-mode fiber
• 1000BASE-LH: 70 km (43.5 miles) using single-mode fiber
• 100BASE-FX: 20 km (12.43 miles) using single-mode fiber
• 100BASE-FX: 2 km (1.24 miles) using multimode fiber
However, power budget constraints must also be considered when calculating the
maximum cable length for your specific environment.