求助!ADSL 经常性掉线(高手来看下)

家用ADSL  ,小猫上网
但是经常性掉线,大概连上1-2小时就会掉线,有时是10分钟左右,时间比较集中。一般上午10点以后
下午3点左右  晚上7点左右  9点左右  11点以后 就不会掉

掉线时猫上的 宽带连接的灯是亮的 也就是说 网络是显示连接上的 但是已经掉线了
要关掉电源重启动猫才能练上
系统没病毒,网卡是主板集成的。
另外换了个猫仍然有问题,叫电信的来看了 也找不出什么问题

这个是掉线时候的PING  前面是掉线了 中间是重启了猫 然后就连接上了

Pinging 202.101.224.68 with 32 bytes of data:

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Reply from 202.101.224.68: bytes=32 time=49ms TTL=250
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Reply from 202.101.224.68: bytes=32 time=60ms TTL=250
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用户系统信息:Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; TencentTraveler ; .NET CLR 2.0.50727; MAXTHON 2.0)