Magnum 4K24 Switches Installation and User Guide (10/04)
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2.2.3
Up-link, port 1X for Cascading
The unit has an Up-link Port 1X, located on the left-front side of the
hub. It enables the first port’s RJ-45 cable to either connect to a user station ( port 1) or
to be cascaded to another hub (port 1X) with cross-over. (See Section 4.4 for more
details about Up-link). Like all 4K24C ports, Port # 1X is a dual-speed switched port
which will sense the speed of the connected device. Use port 1X on one 4K24 and port 1
(or any port) on the second, i.e., use only one crossover port for a cascaded connection.
When the Up-link port is used to cascade two 4K24C together, the auto-
sensing feature will cause the connecting up-link to operate at 100Mb FDX speed.
2.2.4 Fiber-port options for 4K24F Model, 100Mb fiber
Figure 2.2.5 Fiber-Ports, FKM-1ST, FKM-1SC, FKM-1MTRJ
Two fiber ports are optional for Magnum 4K24F Switch. In a two-fiber port
module, all of the fiber ports are of the same speed, the same multi- or single-mode type,
and the same connector type. Multi-mode 100Mbps models are available with ST, SC,
and MT-RJ connectors. Single-mode 100Mbps models are available with SC connectors.
The 100Mb fiber port modules on the Magnum 4K24F normally are set
(factory default) to operate in full-duplex mode for best fiber distance and performance.
On the Magnum 4K24F, the user may select full- or half-duplex mode per-port with an
internal jumper setting (See Section 3.4) for the flexibility to adapt to any type of Fast
Ethernet devices.
On Magnum fiber FKMs, there are two LED’s per fiber port mounted on the
front of the chassis. The Link (LK) LED indicates “ready for operation” when lit, and an
LED indicates Receiving Activity (ACT) on the port. A fiber cable must be connected to
each 100Mb port and a proper Link (LK lit) must be made with the device at the other
end of the cable in order for the LK LEDs to provide valid indications of operating
conditions.
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