The hub or repeater simply repeats an incoming signal on all ports and also sends the jam signal to all ports if there’s a collision.

简单来说，中继器将正常情况下收到的信号，和数据碰撞时产生的拥塞信号重复发送到所有的端口。

youdao

This paper discusses the ways how to receive satellite signal safely from the principle of illegal signal attacking satellite repeater. This has important significance for CATV safety transmission.

从非法信号攻击卫星转发器的原理入手，探讨了有线电视前端卫星信号安全接收的措施，对保证有线电视的安全播出具有重要的参考意义。

youdao

A method of receiving radio paging signal in underground building is proposed, and a practical identical frequency radio paging repeater and its design are provided.

提出了解决地下建筑物内接收无线电寻呼信息的一种方法，并提供了一个实用的同频无线电寻呼中继器及其设计。

youdao

In a classical telecommunications system the signal has to be boosted by a repeater every 80km or so.

ECONOMIST: Quantum information technology