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Recent problems with upstream & disconnects

Posted: Thu Jun 30, 2011 10:52 pm
by plasmapuff
Hi guys,

Just in the past couple of days I've had significant problems with my upstream speed and suddenly have developed drop outs (which I've never had before)

My normal line sync speed for downloads is about 2.3-2.4mbps on ADSL2+. I am about 3.5km from the exchange and was told this was normal for me (line attenuation is 58db).

The download speed hasn't changed, but my uploads are now remarkably slow as can be seen below via ozspeed test.

You uploaded 1 MB bytes in 28.26 seconds.
kbps: 297.16
KB/s: 37.15
Mbps: 0.3

I'm using a Billion 5200G wireless modem/router and haven't changed any of my hardware or configurations on the modem or pc recently.

Has anyone else in Brisbane experienced this? Where to from here?

cheers

Re: Recent problems with upstream & disconnects

Posted: Fri Jul 01, 2011 9:41 am
by Dazzled
58 dB attenuation is hairy. I presume that is the downstream reading. What are the modem upstream stats?

The modem drops when it is unable to determine the digital signal encoded in analogue for transmission on the line, normally because a weak signal is swamped by noise. Upstream data is carried on the next group of frequencies up from voice, and there might be be noise there. Downstream frequencies are higher still, so normally line noise is felt there first.

I suspect the best that can be done is ask for a line test in the hope that a line fault can be found and fixed. Run the modem in isolation first, just in case the noise is being induced by something at home, eg, monitor, TV, appliance, fluoro light, etc. Modem leads are not shielded, so keep it short and away from electrical devices.

Re: Recent problems with upstream & disconnects

Posted: Fri Jul 01, 2011 3:20 pm
by plasmapuff
Thanks a heap dazzled (as always) :)

Here are the line stats from my modem today:
Downstream:
SNR Margin: 12.5 db
Line Attenuation: 57.5 db
Data Rate: 3360 kbps

Upstream:
SNR Margin: 20.0 db
Line Attenuation: 31.0 db
Data Rate: 384 kbps

Upload test from Ozspeed test
You uploaded 1 MB bytes in 29.94 seconds.
kbps: 280.48
KB/s: 35.06
Mbps: 0.28

Haven't had any drop outs today, but it looks like the upstream speed is still horrendous.

Will call through for a line test and report back :)

Out of interest, is there anything I can do to reduce my line attenuation?
cheers, and thanks again.

Re: Recent problems with upstream & disconnects

Posted: Fri Jul 01, 2011 4:00 pm
by ShaminG
Out of interest, is there anything I can do to reduce my line attenuation?
cheers, and thanks again
.

I have arranged a SE to look into this issue :).

Re: Recent problems with upstream & disconnects

Posted: Fri Jul 01, 2011 4:47 pm
by plasmapuff
ShaminG wrote:
Out of interest, is there anything I can do to reduce my line attenuation?
cheers, and thanks again
.

I have arranged a SE to look into this issue :).
Thanks ShaminG :)

I've also asked them to do a line test, guess I spoke too soon, the occasional drop outs (3-4/day) are back :(

Re: Recent problems with upstream & disconnects

Posted: Fri Jul 01, 2011 6:36 pm
by plasmapuff
The support person configured something at his end and told me to reset the modem, which he said would improve things.

However, the upstream speed is still abnormally low (nothing else is connected/running)

Upload test from Ozspeed test
You uploaded 1 MB bytes in 27.2 seconds.
kbps: 308.7
KB/s: 38.59
Mbps: 0.31

Modem Stats
Downstream:
SNR Margin: 11.5 db
Line Attenuation: 59.5 db
Data Rate: 3200 kbps

Upstream:
SNR Margin: 20.0 db
Line Attenuation: 31.5 db
Data Rate: 384 kbps

Sooo where to from here? Haven't had any drop outs since the reset about an hour ago.
Thanks again for your support/suggestions
cheers :)

Re: Recent problems with upstream & disconnects

Posted: Mon Jul 04, 2011 7:29 pm
by plasmapuff
The exetel support staff member adjusted my profile again on Friday, but it still hasn't made a difference to the upstream speed.

Also according to the other members in the family, occasionally phone calls cut out at our end, where they can hear the other person, but they can't hear us. Is this related to the upstream problem?

So where to from here?

Thanks for everyone's help so far :)
cheers

Re: Recent problems with upstream & disconnects

Posted: Mon Jul 04, 2011 7:43 pm
by Dazzled
Are the no-upstream audio phone calls via VoIP or the PSTN service?

Re: Recent problems with upstream & disconnects

Posted: Mon Jul 04, 2011 9:41 pm
by plasmapuff
Are the no-upstream audio phone calls via VoIP or the PSTN service?
PSTN.

I haven't personally experienced it, but it happened quite a few times yesterday apparently.

Re: Recent problems with upstream & disconnects

Posted: Mon Jul 04, 2011 10:09 pm
by Dazzled
I'd use a corded handset for a while, just in case it's an electronic gremlin, and if the phone fault reoccurs, log a phone fault pronto with the phone provider. It will probably fix the internet at the same time. 384 is a suspiciously "round" number.