Allied Telesis AT-FS202SC/FS1 - Manual (Page 13)

AT-FS20x Series Installation Guide
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The port can simultaneously send and receive Ethernet packets using the
same wavelength of 1310 nm for both data streams. This allows for full-
duplex operation with just one strand, as shown in Figure 3.
Figure 3. Two Data Streams on a Fiber Strand
The fiber optic port makes these bridging converter extremely useful in
situations where a conventional fiber optic backbone network no longer
has sufficient bandwidth to handle the data traffic. This problem has
become a common occurrence on many networks due to the rapid growth
of data traffic from sources such as voice over IP, multimedia
applications, video conferencing, and the Internet.
The traditional solution to increasing bandwidth on a fiber optic backbone
has been to install additional fiber optic cable. But this can be an
extremely costly and time-consuming process. Additionally, conventional
fiber optic installations are unable to use the extremely large bandwidth
capacity that is inherent in fiber optic cable.
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