当站端说已经对某个E1通道打了硬环,主站人员输入查看命令后看到的结果应该是(),表明收到了环回
A.LOOPBACK is good
B.have LOOPBACK
C.LOOPBACK is detected
D.LOOPBACK are detected
正确答案是3
当站端说已经对某个E1通道打了硬环,主站人员输入查看命令后看到的结果应该是(),表明收到了环回
A.LOOPBACK is good
B.have LOOPBACK
C.LOOPBACK is detected
D.LOOPBACK are detected
正确答案是3