Allied Telesis AT-FS238b/2 - Manual (Page 13)

AT-FS238a/x and AT-FS238b/x Series Installation Guide
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The port uses a different wavelength for each data stream. Since each data
stream is transmitted at a different wavelength (1310 nm and 1550 nm), the
signals remain separate. This maintains data separation and security.
Additionally, a converter can receive and transmit data on the same fiber
strand. This allows for full-duplex operation with just one strand, as
illustrated in Figure 3.
Figure 3 Two Data Streams on a Fiber Strand
The fiber optic port makes these bridging converters 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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