GarrettCom 1024 Magnum 1000 Workgroup Hubs, Installation and User Guide 04/02, 2.4.4, Distances

Magnum 1000 Workgroup Hubs		Installation and User Guide (04/02)
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	10BASE-FL, FOIRL
	ST Connectors
applications, it supports fiber segments
of up to 1000m in length. The RPM-
FST includes full transceiver	1
functionality and does not require an	2
external transceiver device. In	3
addition to Partition (which is	1 LINK 2 Partition 3 Receive
inoperative on Model 1000 Hubs) and

Receive (RX) LEDs, a LINK LED indicates proper

Magnum RPM-FSTconnectivity 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*	DEFAULT	1 2
3 - 4	0.5 - 3 km**		3 4
5 - 6	1.5 - 4 km**		5 6
* When distances of less than 2 km are needed, the			J1
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			10BASE-FL, FOIRL
Connector)			SC Connectors
	1
		LINK
The Magnum RPM-FSC is also a
	2	Partition
multi-mode fiber optic repeater module. Its
	3	1
functionality is exactly like the RPM-FST, but		Receive		2
it is equipped with an SC-type "snap-in"		3
connector. Please refer back to section 2.4.4
for details.		Magnum RPM-FSC

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