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随着有线通讯技术的发展,光缆在有线通讯领域得到大规模应用,光缆通讯具有容量大、中继距离长、保密性好,抗干扰能力强等特点。对于环境较为复杂,由几大块组成且彼此相距较远的用户,特别适合用光缆作传输主干线,在用户集中区设置一个远端用户模块,电话用户直接从用户模块出线,既降低成本,又可提高通话质量。
With the development of wired communication technology, optical cables have been widely used in the field of wired communication. Optical fiber communication has the characteristics of large capacity, long relay distance, good confidentiality and strong anti-interference ability. For the environment is more complex, composed of several large blocks and are far apart from each other, especially suitable for optical fiber transmission trunk, in the user area set up a remote user module, telephone users directly from the user module outlet, not only reduce costs, But also improve call quality.