GarrettCom Magnum 3000 - Manual (Page 33)

Magnum 3000 Stackable Hubs Installation and User Guide (07/06)
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4.2.4 RPM-FST (Fiber ST, Twist-lock Connector)
The Magnum RPM-FST is a multi-mode fiber optic module equipped with a
dual ST-type connector. It functions as
an IEEE 802.3 full repeater to support
10BASE-FL and FOIRL network
segments. When used for 10BASE-FL
segments, this module supports fiber
optic transmission distances up to
2000m. For FOIRL applications, it
supports fiber segments of up to 1000m
in length. The RPM-FST includes full
transceiver Magnum RPM-FST
functionality and does not require an external transceiver device. In addition to Partition
(PART) and Receive (RX) LEDs, a LINK LED indicates proper connectivity with the
remote device.
NOTE: The RPM-FST/FSC circuit board contains a six pin jumper which controls the
intensity of the transmitted signal. By default, the jumper is placed across pins 1 and 2.
The jumper may be set as follows to accommodate distances of up to 4 km:
JUMPER ACROSS DISTANCES SUPPORTED
1 - 2 0 - 2 km
3 - 4 0.5 - 3 km*
5 - 6 1.5 - 4 km*
When distances of less than 2
km are needed, the jumper
should be placed across pins 1
and 2.
*When fiber cable distances
of more than 2 km are
selected, the minimum cable
length must also be increased,
as shown in the table above.
1
2
3
1 LINK Partition Receive 2 3
10BASE-FL, FOIRL
ST Connectors
1 2
3 4
5 6
J1
DEFAULT