8 Mbps downstream and 30 Mbps upstream. Equipment available in
the near future will push those limits beyond 100 Mbps. While these data rates are
sufficient for many customers, they are not sufficient for all of them.
Hybrid Fiber-Coax 159
Typical Deployment Scenarios
In a typical deployment scenario, shown in Figure 6.1, a single downstream channel
with a data rate of 38.8 Mbps is split and shared over four fiber nodes, with each fiber
node serving a population of approximately 500 households passed (HHP). Each fiber
node has a dedicated upstream channel with a configured data rate of 10.24 Mbps.
Assuming 20 percent penetration of high-speed data customers, the result is approximately
400 customers share the downstream channel and approximately 100 customers
share each upstream channel. With interactive services, this type of deployment
can typically support user data rates in the range of 5 Mbps downstream and 3 Mbps
upstream. Operators generally offer different tiers of service with different configured
data rates (controlled by the provisioning system).
The typical deployment is not a static configuration, however. As penetration rates increase,
the data rates offered to customers increase and user behavior migrates to everhigher
bandwidth usage.
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