Application Notes - SMC Networks SMC6724AL2 Installation Manual

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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. The multimode fiber modules are fitted with SC connectors, but you
can attach an ST plug to the switch using SMC's SC-to-ST plug
converter (Part Number: 99-012034-091, for 62.5/125 micron cable
only). If you do use an ST plug converter, be sure you run cable from
the Rx (Tx) port on the module to the Tx (Rx) port on the target
device.
4. As a general rule the length of fiber optic cable for a single switched
link should not exceed:
•
•
However, power budget constraints must also be considered when
calculating the maximum cable length for your specific environment.
2-6
1000BASE-SX/LX: 550 m (1805 ft) for multimode fiber or 5 km
(16404 ft) for single-mode fiber.
100BASE-FX: 2 km (1.24 miles) for multimode fiber or 20 km
(12.43 miles) for single-mode fiber.