These architectures have hard, upper limits on per-customer bandwidth, and if
the per-customer bandwidth proves to be insufficient as the services evolve, the service
provider must either upgrade the network (expensive and time consuming) or lose
market share. In other words, in building a business case for an EPON deployment,
the proper question may not be, ???what is the cost of deploying an EPON-based access
network???? but rather, ???what is the cost of not deploying such a network????
Vendors Promoting This Solution
The EPON market is a rich ecosystem with multiple system vendors focusing on various
market segments, starting from chip vendors through system developers to network
developers and planners. EPONs today are already under extensive deployment,
with approximately 6+ million lines in operation, while the total deployed CO port
Passive Optical Networks (PONs) 195
capacity exceeds 16+ million units with the growth rate exceeding 300,000 ports per
month. So far, the main EPON deployments are being carried out by Asian carriers,
namely KDDI, K-Opticom, Korea Telecom, NTT, and Softbank BB. Other national carriers
on the remaining continents, including the Americas and Europe, are mainly at
the evaluation stage.
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