目录6ADSL业务故障处理..........................................................................6-16.1故障处理流程................................................................................................................................................6-26.1.1业务影响和防范...................................................................................................................................6-26.1.2流程图...................................................................................................................................................6-26.1.3初步定位故障位置...............................................................................................................................6-36.1.4检查终端状态.......................................................................................................................................6-36.1.5检查线路状况.......................................................................................................................................6-56.1.6检查DSLAM运行状态.......................................................................................................................6-56.1.7检查DSLAM配置数据.......................................................................................................................6-56.1.8检查上层设备状态...............................................................................................................................6-76.2常见故障处理方法........................................................................................................................................6-76.2.1常见故障分类和原因分析...................................................................................................................6-76.2.2Modem无法激活或者频繁去激活......................................................................................................6-86.2.3不能打电话、不能上网.....................................................................................................................6-106.2.4能打电话、不能上网.........................................................................................................................6-106.2.5上网速度慢.........................................................................................................................................6-116.2.6上网时经常中断.................................................................................................................................6-126.3典型案例......................................................................................................................................................6-126.3.1电话无拨号音，但是能上网.............................................................................................................6-126.3.2电话有拨号音，但是不能上网.........................................................................................................6-136.3.3打电话时ATU-R容易出现去激活现象...........................................................................................6-146.3.4网卡软硬件设置不一致导致上网速度很慢.....................................................................................6-146.3.5用户线连接错误导致Modem不能激活.........................................................................
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