The ADSL Functional Segments
For you to understand any operation model, you must understand the functional segments of DSL-based solutions, as shown in Figure 3-1. The segments are based on the ADSL Forum reference model.
Figure 3-1. ADSL Functional Segment Diagram
As Figure 3-1 shows, a DSL network has distinct segments:
A different company might own each of these segments or sometimes one company might be both an NAP and NSP. The following sections discuss the functions of each segment in detail. You will see the terms CPE, NAP, and NSP used to explain ...
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