是的。ETH接口指的是接口，是目前应用最广泛的局域网通讯方式，同时也是一种协议。而以太网接口就是网络数据连接的端口。
以太网的每个版本都有电缆的最大长度限制（即无须放大的长度），这个范围内的信号可以正常传播，超过这个范围信号将无法传播。
Each version of the Ethernet has a maximum length limit on the cable (i.e. a length that does not need to be magnified) and signals in this range can be transmitted normally and beyond this range will not.
为了允许建设更大的网络，可以用中继器把多条电缆连接起来。中继器是一个物理层设备，它能接收、放大并在两个方向上重发信号。
In order to allow a larger network to be built, multiple cables can be connected by . The repeater is a physical layer device that receives, magnifies and retransmits signals in two directions.
基本内容 Basics 计费系统硬件典型的接口类型是RJ-45以太网接口。它遵循IEEE802.3标准，传输速率通常为10M/100/1000Mbps，可工作在全双工、半双工模式。如下图的WAN口（广域网口）和1、2、3、4标识的端口就是RJ-45端口。 The typical type of interface for the hardware of the billing system is RJ-45 E-Tex interface. It follows the IEE802.3 standard, usually with a transmission rate of 10M/100/1000Mbps, and can work at , half-manual mode. The WAN portal () and the ports of 1, 2, 3 and 4 marking are RJ-45 ports. 网络电话的网络接口类型是网络电话与内部局域网连接的时候所用的接口类型，不同的网络有不同的接口类型，常见的网络电话接口主要有RJ-45接口，RJ-11接口和USB接口。 is the type of interface used by the network phone when connecting to the internal local area network (LAN). Different network types of interfaces exist. The common network phone interfaces are mainly RJ-45 interfaces, RJ-11 interfaces and
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