A reverse path is taken back to the calling component.
反向路径被送回到调用组件。
The value of this via element should indicate the reverse path.
这个via元素的值应该指出反向路径。
This indicates an implicit reverse path, which will be provided by the underlying protocol.
该值表示使用隐式反向路径，该路径将由底层协议提供。
A fault should be generated when the forwarding process fails or the reverse path information cannot be provided.
当转发过程失败或者无法提供反向路径信息时，应该生成错误。
Traditionally, such a circuit was provisioned through the use of two copper pairs, one for transmission ( forward path , or upstream path ) and one for reception ( reverse path , or downstream path );
传统上，这种电路通过使用两个铜电缆对提供，一个用于发送（前向路径或上游路径）、一个用于接收（反向路径或下游路径）。
Traditionally, such a circuit was provisioned through the use of two copper pairs, one for transmission ( forward path , or upstream path ) and one for reception ( reverse path , or downstream path );
传统上，这种电路通过使用两个铜电缆对提供，一个用于发送（前向路径或上游路径）、一个用于接收（反向路径或下游路径）。
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