GarrettCom 1008 User Manual
Page 19
Magnum 1000 Workgroup Hubs Installation and User Guide (04/02)
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2.4.4
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
functionality and does not require an
external transceiver device. In
addition to Partition (which is
inoperative on Model 1000 Hubs) and
Receive (RX) LEDs, a LINK LED indicates proper
Magnum RPM-FST connectivity with the remote device.
NOTE: The RPM-FST 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.
2.4.5
RPM-FSC(Fiber SC, Snap-in
Connector)
The Magnum RPM-FSC is also a
multi-mode fiber optic repeater module. Its
functionality is exactly like the RPM-FST, but
it is equipped with an SC-type "snap-in"
connector. Please refer back to section 2.4.4
for details.
Magnum RPM-FSC
1
2
3
1
LINK
Partition
Receive
2
3
10BASE-FL, FOIRL
ST Connectors
1 2
3 4
5 6
J1
DEFAULT
1
LINK
Partition
Receive
2
3
10BASE-FL, FOIRL
SC Connectors
1
3
2