ADSL2+线路衰减严重 求分析

ghost822

家里的ADSL2+是一个不知名的小公司（acnpacific），貌似还是个传销公司，ISP租用墨尔本，天生延迟100ms+。
发现下行衰减特别高，达到了53db，而上行只有14db。ping google 间歇性丢包2%-5%。基本无法online，视频加载十分缓慢，就下载速度还比较稳定。
据说下行应该比上行低，而且家里离exchange 只有100米，线路距离也不过183m（adsl2+exchange查的）。
请问是否由于cable中一个下行线接触不良导致，需要找cabler调试MDF么？
还有客服也无法查到连接的到底是那个exchange，也可能链接远的空闲exchange导致高衰减（但上行衰减很低）？
还是由于telstra线路问题或者modem问题。排查应该走什么步骤呢？
附图

caesar6668

查你家离基站有多远， 越远速度越慢， 换个MODEM 试试， 效果还是一样再查线

ssphinx

应该就是电话铜线的问题， 你自己是没法了，只能要电话公司来修或换线。电话是tesltra的吗？是不是有很多噪音，可以打给telstra说电话不好用，不要说adsl先，要他们来人帮忙查线路。

ssphinx

刚才没仔细看，下行13M不错了，adsl2+最高也就24M。

ghost822

ssphinx 发表于 2015-3-18 15:12
刚才没仔细看，下行13M不错了，adsl2+最高也就24M。

下载速度可以，但是衰减太高了，丢包严重。

staples

下载速度有20Mbps么

ghost822

staples 发表于 2015-3-18 15:39
下载速度有20Mbps么

有7.8m的样子 所以问下是不是一根下行线掉了 导致的高衰减 一半网速 毕竟100m基本属于贴着exchange了

ghost822

staples 发表于 2015-3-18 15:39
下载速度有20Mbps么

有7.8m的样子 所以问下是不是一根下行线掉了 导致的高衰减 一半网速 毕竟100m基本属于贴着exchange了

袋鼠

It's probably due to a faulty phone cable.
Just call your ISP to log a fault ticket and then your ISP will get Telstra technician to investigate it.
If it's something wrong with Telstra's phone cable out of your house, Telstra will fix it without charging you.
If the issue is with phone line inside your house, you'll need to pay for someone to get it done.

I recently had very slow internet speed with TPG. I called TPG on a Friday night and TPG got a Telstra technician to fix the phone cable the next day - a Saturday! Quite impressed.

I personally find TPG's service quite impressive, always coming back with responses quickly and their service reps polite.
Although their service reps are probably in India, they don't have strong accent.

staples

ghost822 发表于 2015-3-18 15:13
有7.8m的样子 所以问下是不是一根下行线掉了 导致的高衰减 一半网速 毕竟100m基本属于贴着exchange了 ...

ADSL2+ 峰值速度是24M。电话线就2条线。所以应该是房子内部线路老化吧

dayu79

线路连接处不紧也有可能

th123456

Cable is better now

Sammy-Chen

"Faulty cable" - or modem
your line attenuation is at 53.5dB - its toooo high if your <200m from exchange, you should expected less than 10dB.
contact your ISP to check the line.

also if you are using long phone cable (>3m) between wall outlet to your modem that will be an issue too

use adsl2exchanges.com.au and enter your home address to find out the exchange detail