Fiber entering a
building is generally not connected directly to the end customer, as a relatively small
percentage of individual businesses have bandwidth requirements necessitating fiber.
Fibers that reach the end customer??™s building are typically terminated on service provider
equipment. The cost of utilizing fiber within a LAN is negligible, while the cost
of using fiber in the MAN is high. Even after expensive fiber build-outs occur, the extension
of fiber to a building does not necessarily mean fiber is available and economical
for use by individual businesses, especially for point-to-point connectivity between
geographically diverse locations.
Circuit bonding can be used to provide Ethernet services by bonding multiple T1s
together to form a broadband pipe. Additionally, this pipe can then be used to support
Ethernet services and other legacy traffic, such as TDM voice traffic.
Because fiber is expensive, scarce, and generally not needed from a bandwidth perspective,
an Ethernet deployment requiring fiber to the customer location severely
limits the market for the service. Fiber connectivity is typically provided to large businesses
with high bandwidth requirements.
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