GarrettCom 1008 - Manual (Page 20)

Magnum 1000 Workgroup Hubs Installation and User Guide (04/02)
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2.4.6 RPM-SMF (Single-mode Fiber)
The Magnum RPM-SMF is a single-mode fiber optic module equipped with a
dual ST-type connector. It functions as a full repeater to support single-mode fiber
networks. The RPM-SMF supports fiber optic transmission distances of up to 10 Km.
The RPM-SMF includes full
transceiver functionality and does
not require an external
transceiver device.
This module is
equipped with PART, RX, and
LINK LEDs identical to those of
the RPM-FST. To distinguish
the single-mode RPM-SMF from the multi-mode Magnum RPM-SMF
RPM-FST, the label “Sgl. M.” is at the top of the faceplate of the RPM-SMF. As an
additional indicator, a multi-mode TX port emits light (red in color) that is in the visible
spectrum and which can be seen by looking into the port with the power on and with no
cable connected. The single-mode TX port emits light outside of the visible spectrum
and will always look dark to the human eye.
Note: Be sure to use single-mode fiber optic cable with this module (see Section 3.8.9).
Single-mode fiber cable has a smaller diameter than multi-mode fiber cable (2/15 - 8/60
microns for single-mode, 50/125 or 62.5/125 microns for multi-mode, where xx/xx are
the diameters of the core and the core plus the cladding respectively).
NOTE: The RPM-SMF circuit board contains a six-pins (three positions)
jumper, but the jumper is only to be placed across pins 5 & 6 for single-mode. The
other jumper positions are not used for single-mode fiber.
JUMPER ACROSS DISTANCES
SUPPORTED
1 - 2 not used
3 - 4 not used
5 - 6 0 - 10 km
1
2
3
1 LINK Partition Receive 2 3
Single-mode
ST Connectors
1 2
3 4
5 6
J1
DEFAULT