3.1 Telecommunication Cable Line Network Architecture

3.1.1 Telecommunication cable line network(Figure 3.1.1)shall include long-distance lines,local lines and access lines,using transmission media such as optical cables and copper cables.

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Figure 3.1.1 Reference model for communications networks

3.1.2 The access network part(Figure 3.1.2)shall include primary cables,secondary cables and user drop wires,using transmission media such as optical cables and copper cables.

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Figure 3.1.2 Structure of access network lines