【求助】有没有比较了解ADSL的？有个问题问一下，NB不多，送光为止

ebola

Let us assume that you have (a new) 2M/1M ADSL line at home. Your ADSL-modem seems to be working (your friend has tested it in his/hers ADLS line) and settings should be correct but still you are facing some problems: Download and/or upload rate seems to be less than promised and/or Internet connection is not working all the time. i) List and explain shortly what can cause this kind of problems. (Please, keep main focus on ADSL related issues) II) Is there anything you can do or check before contact your IPSs tech. support? If there is something, please explain what? III) What your ISP can do to help you?

ice_poss

本来就是跟承诺的速度不一样嘛！好像没有1M ADSL就真的速度达到1M。

如果你怀疑是自己线路质量问题，可以打电话反映，他们会派人来给你检查线路。但是最好把问题说的严重些。

[ Last edited by ice_poss on 2005-10-4 at 02:55 ]

haihai

XD在国外？北京的512k能达到70K，倒是高于理论速度的

luoht

QUOTE:

Originally posted by ebola at 2005-10-4 02:20 AM:
Let us assume that you have (a new) 2M/1M ADSL line at home. Your ADSL-modem seems to be working (your friend has tested it in his/hers ADLS line) and settings should be correct but still you are f ...

一、如果能上网，证明ADSL的设置是正确的，余下只是速度问题。
二、ADSL的速度和线路状况很有关系。通常影响速度的因素有：
1) ADSL Modem与电信机房(DSLAM)的距离。
2) 电话线(copper wire)的粗细。
3) 接线口的质量(接触是否良好)。
4) 天气(主要是湿度)。

因此ADSL不是恒速的。即使在同一线路上，也有可能有不同速率。

如果有时有连接，有时没连接，说明你的ADSL Modem和机房的距离已经处于临界状态。可让 ISP 来测一下信号(dB值)。如果信号太弱，他们可以适当调整信号(或重新铺设线路)。

[ Last edited by luoht on 2005-10-4 at 03:51 ]

ebola

谢谢楼上几位XD,特别是luoht XD的发言，这是偶的一个作业题，不太了解这方面的东西，所以上来问问，呵呵

luoht

如果是作业题，那无非就是：

1) 检查 ADSL Modem 的载波(CD)灯是否稳定
2) 检查 Computer 与 Modem 之间的连接
3) 检查 Computer 的软、硬件设置