Strange problem with DSL

I am having a strange problem with my DSL connection. The problem occurs after approx every 3-4 minutes and the internet becomes unusable for 2-3 minutes. DSL lights, Line statistics, Internet light everything remains stable but still the internet becomes unusable. The problem has been there since last 2-3 months and i have done some test to see if i can find out what is causing it.

When the problem occurs the ping becomes more than 800ms and remains high for 2-3 minutes. I can't browse during that time but can download using torrent (probably UDP vs TCP). Then when the ping becomes normal only then am I able to browse any thing

Here are the ping results during the time when problem occurs:

Pinging to google.com 

Reply from 182.176.45.45: bytes=32 time=813ms TTL=60
Reply from 182.176.45.45: bytes=32 time=826ms TTL=60
Reply from 182.176.45.45: bytes=32 time=819ms TTL=60
Reply from 182.176.45.45: bytes=32 time=811ms TTL=60
Reply from 182.176.45.45: bytes=32 time=820ms TTL=60
Reply from 182.176.45.45: bytes=32 time=821ms TTL=60
Reply from 182.176.45.45: bytes=32 time=811ms TTL=60
Reply from 182.176.45.45: bytes=32 time=812ms TTL=60
Reply from 182.176.45.45: bytes=32 time=813ms TTL=60
Reply from 182.176.45.45: bytes=32 time=813ms TTL=60
Reply from 182.176.45.45: bytes=32 time=815ms TTL=60
Reply from 182.176.45.45: bytes=32 time=816ms TTL=60
Reply from 182.176.45.45: bytes=32 time=821ms TTL=60
Reply from 182.176.45.45: bytes=32 time=823ms TTL=60
Reply from 182.176.45.45: bytes=32 time=814ms TTL=60
Reply from 182.176.45.45: bytes=32 time=816ms TTL=60
Reply from 182.176.45.45: bytes=32 time=818ms TTL=60
Reply from 182.176.45.45: bytes=32 time=821ms TTL=60
Reply from 182.176.45.45: bytes=32 time=812ms TTL=60
Reply from 182.176.45.45: bytes=32 time=824ms TTL=60
Reply from 182.176.45.45: bytes=32 time=825ms TTL=60
Reply from 182.176.45.45: bytes=32 time=814ms TTL=60
Reply from 182.176.45.45: bytes=32 time=816ms TTL=60
Reply from 182.176.45.45: bytes=32 time=812ms TTL=60
Reply from 182.176.45.45: bytes=32 time=814ms TTL=60
Reply from 182.176.45.45: bytes=32 time=814ms TTL=60
Reply from 182.176.45.45: bytes=32 time=818ms TTL=60
Reply from 182.176.45.45: bytes=32 time=822ms TTL=60
Reply from 182.176.45.45: bytes=32 time=684ms TTL=60
Reply from 182.176.45.45: bytes=32 time=35ms TTL=60 (<–Problem disappears here)
Reply from 182.176.45.45: bytes=32 time=33ms TTL=60
Reply from 182.176.45.45: bytes=32 time=134ms TTL=60
Reply from 182.176.45.45: bytes=32 time=32ms TTL=60
Reply from 182.176.45.45: bytes=32 time=33ms TTL=60
Reply from 182.176.45.45: bytes=32 time=32ms TTL=60
Reply from 182.176.45.45: bytes=32 time=32ms TTL=60
Reply from 182.176.45.45: bytes=32 time=32ms TTL=60
Reply from 182.176.45.45: bytes=32 time=33ms TTL=60
Reply from 182.176.45.45: bytes=32 time=32ms TTL=60
Reply from 182.176.45.45: bytes=32 time=32ms TTL=60
Reply from 182.176.45.45: bytes=32 time=31ms TTL=60
Reply from 182.176.45.45: bytes=32 time=33ms TTL=60
Reply from 182.176.45.45: bytes=32 time=32ms TTL=60
Reply from 182.176.45.45: bytes=32 time=32ms TTL=60
Reply from 182.176.45.45: bytes=32 time=33ms TTL=60
Reply from 182.176.45.45: bytes=32 time=33ms TTL=60
Reply from 182.176.45.45: bytes=32 time=33ms TTL=60
Reply from 182.176.45.45: bytes=32 time=33ms TTL=60
Reply from 182.176.45.45: bytes=32 time=32ms TTL=60




The traceroute shows:

tracert google.com

Tracing route to google.com [182.176.45.40]
over a maximum of 30 hops:

1 2 ms 1 ms 2 ms 192.168.1.1
2 821 ms 823 ms 868 ms 182.181.128.1
3 823 ms 828 ms 823 ms 182.184.1.202
4 865 ms 817 ms 824 ms 182.184.1.89
5 887 ms 836 ms 835 ms 182.176.45.40

I have contacted PTCL Helpline and well as the exchange and the DSL high ups at PTCL but none have been of much help. The DSL guy and lineman have come many times but are clueless as to where the problem is as they say they have changed the pair and everything else they could but the problem is still there. I have changed the modem, the PC but nothing seems to help.

NB: Even during writing this post the problem has occured 3-4 times and has made internet practically unusable for me. Do any of you guys have any ideas as to what might help apart from changing the ISP?

DSL Line statistics: (line attenuation values are higher today but usually they are 8-10 db)

Hello!

- First of all, you need to attach your modem logs especially the PPP ones if available to determine if there is an issue with your session (line up count indicates re-sync)

- Secondly, you need to set your adsl modulation scheme to G.DMT (no need for ADSL2+ with your 1Mbps connection ... upstream rate of 382 instead of ~512 indicates noisy line ... check the filter/splitter as well)

- Then, you may try changing your DNS server(s) to either NortonDNS or OpenDNS or GoogleDNS ...

Please do report back!

Regards,

Ahmed Faraz

Thanks for replying

I have tried the above mentioned tips but still there is problem of high ping. Modem logs don't show any disconnection or loss of sync.

Any other suggestion?

[quote=“generaluser, post:3, topic:20468”]

Thanks for replying

I have tried the above mentioned tips but still there is problem of high ping. Modem logs don't show any disconnection or loss of sync.

Any other suggestion?

[/quote]

Change Modem. :)

There is no reason to get 800+ static ping time. Even though Downloading goes at peak it would not cross more than 200 ms.

download tcpview utlity on your system http://www.softpedia.com/get/Network-Tools/Network-Information/TCPView.shtml and check.

I think your system is generating fake upload request.

Hello Again!

It is entirely possible that your exchange may be going through some upgrade(s) and the issue may not be at your end ... like sometime ago, there was this problem in general and I noticed that the problem resolved itself when I noticed a change in the dslam vendor ID (from Infineon to Globespan)!

Regards,

Ahmed Faraz

^He is the man :rolleyes:.

I also faced this disconnection,no browsing but can download problem,i changed nothing but few complaints from my bro. --> PTCL nothing worked than this problem slowed downed and we got rid of it.....Every thing is working fine now

Replacement of modem would fix the issue :)

Simply goto exchange with current modem. Ask them to replace it.

I have mentioned that i have tried this with 4 modems (1 Linksys router, 1 netgear router, 1 ZTE modem, 1 PTCL ZTE Router) all of them have this problem. Then I tried to check ping on my mobile phone, Tablet, another PC but all show the same issue.

I have talked to everyone in the exchange from the DSL technician all the way to the head of DSL operations in my area but they were clueless about the cause. PTCL guys say there is no upgrade going on in the exchange. Its been 2-3 months i am having this problem.

I have tried to check this ping by SSH and Telneting to the router and have run ping to a remote host directly from the router itself so that the PC problems (if any) are eliminated but pinging from the router also shows the high ping problem so the problem can't be with the PC/Tablet/Phone.