Approaches to AAAs
There are three predominant Advanced Access Architectures in use by the telcos, and those used by the cable companies are generally similar, only having coax on the last leg. These are the AT&T approach of fiber-to-the-node (FTTN); the Verizon approach of fiber-to-the-premise (FTTP or FTTH): and the BellSouth (now AT&T) approach of fiber-to-the-curb. A comparison of these follows:
Figure 2, Predominant Advanced Access Architectures
Arch. |
Name |
Description |
Distance of Last Leg |
FTTC |
Fiber-to-the-curb |
Very near the home — Used primarily by BellSouth. Can be used with VDSL to deliver HDTV, high-speed data, and voice |
500 feet |
FTTN |
Fiber-to-the-node |
Serves a subdivision — AT&T and Qwest current primary plan; can be used with VDSL2 or ADSL2+ to deliver HDTV, high-speed data, and voice |
3000-5000 feet |
FTTH/P |
Fiber-to-the-home/premises |
Fiber all the way to the house — Verizon's current plan |
N/A |
This report will focus on these three approaches to Access Architectures and on the costs associated with each. We will build models that will allow the reader to make an even comparison among the three approaches in terms of costs.
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