信号: signal; semaphore; gun链路: chain circuit; periodic line ...故障: hitch; breakdown; stoppage; ...链路故障: link-down信号链路: signal link; signaling link信号链路码: signaling link code信号链路群: signaling link group备用信号链路: reserve signaling link工作信号链路: working signaling link数字信号链路: digital signal link信号链路复原: signaling link restoration信号链路功能: signaling link function信号链路管理: signaling link management信号链路启用: signaling link activation信号链路选择: signaling link selection信号链路阻塞: signaling link blocking电路故障信号: circuit alarm网路故障信号: network failure signal信号链路阻断消除: signaling link unblocking全天候备用信号链路: full time reserve signaling link专用的备用信号链路: dedicated reserve signaling link准对应备用信号链路: quasi-associated reserve signaling link信号链: signal chain用信号寻找线路故障: signal tracing拨号链路: dial-up link
