数据通信中，分组装拆设备只能设在远离分组变换机的地方，采用X.25协议接至分组交换机。（ ）

相关题目

• In the microwave transmission,the rain attenuation are calculate
• Digital microwave systems can be used for telephone, data, image
• The remote communication of the microwave relay communication is
• In the digital microwave communication system, in order to meet
• What's function of the duplexer in the microwave communication s