这种衍生的UTP电缆支持一种“自动配置协议”，允许两个以太网系统自行决定采用全双工抑或半双工操作。
The UTP Ethernet variants support an additional autoconfiguration protocol that allows two Ethernet systems to negotiate which speed to use, in full or half duplex mode.
在自动配置协议广泛流传开来之前，人们有时会手工配置计算机系统，以改用全双工操作，但另一台计算机依然会使用半双工操作。
Before the autonegotiation protocol was widely used, people would sometimes manually configure one system to use full duplex, but the other would use half duplex.
在ISDN用户线基本接入全双工传输系统的设计中，线路编码是重要的一步。
Line coding is an important step in the design of full-duplex transmission system to support ISDN subscriber line basic access.
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