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Magnum 700X Mini-Concentrators Installation and User Guide (05/98)
GARRETT
21
10BASE-FL for users is the maximum distance allowed. 10BASE-FL is used for a fiber segment
length of up to 2000m, while FOIRL is used for fiber segments of up to 1000m in length.)
1. Before connecting the fiber optic cable, remove the protective dust caps from the tips of
the connectors on the PM-ST. Save these dust caps for future use.
2. Wipe clean the ends of the dual connectors with a soft cloth or lint-free lens tissue
dampened in alcohol. Make certain the connectors are clean before connecting.
Note: One strand of the duplex fiber optic cable is coded using color bands
at regular intervals; you must use the color-coded strand on the
associated ports at each end of the fiber optic segment.
3. Connect the Transmit (TX) port (light colored post) on the Magnum PM-FST to the
Receive (RX) port of the remote device. Begin with the color-coded strand of the cable for
this first TX-to-RX connection.
4. Connect the Receive (RX) port (dark colored post) on the PM-FST to the
Transmit (TX) port of the remote device. Use the non-color coded fiber strand for this.
5. The LINK LED on the front of the PM-FST will illuminate when a proper
connection has been established at both ends (and when power is ON in the unit). If
LINK is not lit after cable connection, the normal cause is improper cable polarity. Swap the
fiber cables at the Port Module connector to remedy this situation.
3.2.5 Connecting Fiber Optic (SC-type, "Snap-in")
The same five-step procedure as for fiber ST-type applies to 10BASE-FL applications
using an RPM-FSC card used with SC-type fiber connectors. Follow the five steps as described
in the paragraph above. See Section 2.3.5 for a view of the SC-type connector.
When connecting fiber media to SC connectors, be sure that the fiber cable goes to
another device operating at 10Mb Ethernet speed. (The SC-type fiber connectors are frequently
used at 100Mb speeds, but is rare at 10Mb speed and may be confusing accordingly).
3.2.6 Connecting Single-Mode Fiber Optic (SMF)
When using the RPM-SMF, be sure to use single-mode fiber cable. 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). Because of this, single-mode fiber allows full bandwidth at
longer distances, and may be used to connect nodes up to 10km apart (but note that collisions
increase for distances over 4Km, a maximum-sized collision domain at 10Mb Ethernet speed).
The same five-step procedure for multi-mode fiber ST-type applies to single-mode
fiber connectors. Follow the five steps listed in Section 3.2.4 above.