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260 Chapter 10

Figure 10-20
These can be
mounted side
by side.

The glory of these systems is that no licensing is done, and the pro-
visioning of 155 Mbps is fast. Systems can be up and running in a
matter of hours rather than days. If 155 Mbps is not sufficient, then
they can be mounted very close to each other, adding another 155
Mbps, as shown in Figure 10-20. The reason is that the “guns” have
lenses that use tight angles.

Wireless Optical Networking

(WON)

Wireless Optical Networking (WON) is a technology that improves
upon the concept of free-space optics. A wireless optical link consists
of two transceivers aimed at each other with a clear line of sight.
Typically, the optical transceivers are mounted on rooftops or inside