在SM4C开局过程中,模拟信令板(ASIG)按以往配置时,经常会遇到如下故障:当SM4C模块局开通后,在机架告警图上可以看到ASIG板无故重启,部分用户板也经常重启,造成用户无声现象。起初时怀疑ASIG板故障,经换板试验后发现,换上以往常用的ASIG板后,故障现象消失,由此判定该故障是由ASI During the SM4C start-up process, the analog signaling boards (ASIGs) often encounter the following faults as they are configured in the past. When the SM4C module is powered on, the ASIG board can be restarted for no reason on the shelf alarm map. Some user boards Often restart, causing the user silent phenomenon. Initially doubt ASIG board failure, after the board test found that after replacing the ASIG board used in the past, the phenomenon disappears, which determine the failure is caused by the ASI