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所在平台: Udemy |
课程主页: https://www.udemy.com/course/learn-about-transmission-used-in-telecom/
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**课程总结：电信传输网络学习** 本课程将全面介绍电信传输网络。我们首先会学习传输网络的核心概念，即负责在网络节点之间传输海量数据的实体。课程将深入探讨传输网络的不同分层，包括： * **接入网络 (Access Network)：** 负责提供从客户终端设备到网络的“最后一英里”通信。 * **城域接入网 (Metro Access Network)：** 连接接入节点和汇聚节点的网络。 * **城域汇聚 (Metro Aggregation)：** 负责汇聚来自区域网络的流量。 * **核心网 (Core Network)：** 由核心层交换机组成，主要提供不同用户之间的互联互通。 * **骨干网 (Backbone)：** 连接各个网络部分，为不同局域网或子网络之间交换信息提供路径。 随后，课程将重点讲解**传输介质**，包括： * **引导型介质 (Guided Media)：** 信号被限制在特定路径上传输的物理链路。 * **非引导型介质 (Unguided Media)：** 即无线介质。 在传输模式方面，我们将主要学习**微波 (Microwave)** 和**光纤 (Optical Fiber)** 这两种常用模式。 课程还将深入讲解**复用技术 (Multiplexing)**，该技术允许在共享的高容量传输介质（如铜缆或光纤）上同时发送多个信号。 最后，我们将重点学习电信传输网络中的主要传输技术，它们将构成课程学习的重要组成部分： * **脉动数字体系 (PDH - Plesiochronous Digital Hierarchy)** * **同步数字体系 (SDH - Synchronous Digital Hierarchy)** * **密集波分复用 (DWDM - Dense Wavelength Division Multiplexing)** * **粗波分复用 (CWDM - Coarse Wavelength Division Multiplexing)** 通过本课程的学习，您将对电信传输网络有一个深入的理解。
Transmission refers to the network entity that transports bulk traffic between network nodes. This transport is over a carrier, on which everything is packed and stacked. Participants will learn about transport network which can be divided into various layers, such as Access network, Metro Access, Metro aggregation, Core, and Backbone. Briefly, Access network provides the last mile communication from Customer Premises Equipment to the network. Metro access network is the one which connects access nodes to aggregation nodes. Core network consists of core layer switches. This layer is mainly used to provide interconnectivity among different users. A backbone is a part of network that interconnects various pieces of network, providing a path for the exchange of information between different LANs or subnetworks. Transmission medium is the mean through which signal is transferred from one place to another. There are two types of media used in transmission medium. These are guided media and unguided media. Guided media are the physical links through which signals are confined to narrow path. Unguided media is the wireless media. There are two type of transport mode which are mostly used. These are Microwave and Optical fiber. Multiplexing is used to send multiple signals over a common high capacity transmission media, such as copper or fiber. Major transport technologies that are used in transmission network are: Plesiochronous Digital Hierarchy or (PDH) Synchronous Digital Hierarchy or (SDH) Dense Wavelength Division Multiplexing or (D-WDM) Coarse Wavelength Division Multiplexing or (C-WDM) These will form good part of the learning content of the overall course.
