To carry out telecommunications, three types of devices are required: communication terminal equipment that converts the original information to be transmitted into an electrical signal, a transmission line that transmits the converted electrical signal, and a switch that sets up a connection path to the communication partner and performs various communication services associated with the communication. These devices are organically linked to each other to form a network. This network is called a telecommunications network. Figure 1 shows the basic configuration of a telecommunications network. [Type of telecommunications network] There are many different types of telecommunications networks, and they can be classified from various perspectives. Source: Heibonsha World Encyclopedia, 2nd Edition Information |
電気通信を行うためには,伝達すべき原情報を電気信号に変換する通信端末装置,変換した電気信号を伝達する伝送路,通信相手までの接続経路を設定したり,その通信に付随するいろいろな通信サービスを実行する交換機の3種類の装置が必要である。これらの装置は互いに有機的に結合されてネットワークを構成している。このネットワークを電気通信網という。図1に電気通信網の基本構成を示す。 [電気通信網の種類] 電気通信網にもいろいろな種類があり,またいろいろな立場から分類することができる。 出典 株式会社平凡社世界大百科事典 第2版について 情報 |
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