In the power telecom networks, the distance between two nodes is always too long to use the normal optical transceiver, so we have to use Erbium-Doped Fiber Amplifier (EDFA) additionally.

• 在电力专网光纤通信电路建设中,由于光纤节点间距离较长,超过一般光端机收发信电平的容许门限,因此需要另外使用掺铒光纤放大器(EDFA)设备。