Net Optics Fiber Mode Converters - Manual (Page 9)

Fiber Mode Converter
5
Connecting to the Network
The FMC series converters with F/O connections operate over duplex fiber
optic cable. This means that two separate fiber optic cables are used for
data transmission. One cable is for transmitting data and the other is for
receiving data. The transmit port is designated with TX and the receive port is
designated with RX. When attaching the FMC converter to another fiber optic
device, the TX port on the FMC converter must be attached to the RX port on
the other device and vice-versa. When the connection is correct, the F/O link
LED will remain lit.
Fiber optic cable connectors must match the card type i.e. (SC), and the cable
type (multimode) or (single mode). The fiber optic cable must not be bundled
with too tight of a bend radius. This may attenuate the light intensity resulting
in link failure. A tight bend radius can also result in accelerated stress fracture
of the glass cable fibers making premature cable failure likely.
Note: For 100 Mb/s, half-duplex operation, linking two DTEs via a fiber optic
segment; the maximum transmission range is approximately 412 meters. If
an FMC converter is used to link two DTEs in half-duplex, a bit budget (bit
time delay) calculation should be made to confirm the validity of the network
topology.