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ADSL Speed limited to 150 kbps

ftb101
Hooked
Posts: 5
Registered: 08-01-2017

ADSL Speed limited to 150 kbps

Hi,

Please help, I am rapidly running out of ideas.  My broadband download speed used to max out at around 300-350 kB/s only 3 weeks ago.  Just before Christmas we experienced a few connection issues, the DSL was synced on the router but the internet speed was very slow.  The speed improved after that day but has not ever recovered to it's normal speed.  Instead, no matter how I test, the speed is limited to half what it used to be - 150 kB/s.  It's like something is artificially limiting my bandwidth.  The connection rate of my router is the same as it was before I experienced this issue (around 4500 kbps) .  I have checked all my drivers and connection settings, but nothing seems to be amiss.  I anticipated a stuck profile but the BT profile for the line is 3.5 Mbps - the same as it was before the issue.  Is it possible that the profile is stuck and being misreported?

 

BTW Speed Test

 

 Download speed achieved was: 1.25 Mbps

DSL Connection rate is: 4.42 Mbps (DOWN), 0.45 Mbps (UP)

IP Profile for line is: 3.5 Mbps

 

Router settings:

 

TCM(Trellis Coded Modulation)
1
1
SNR Margin
4.0 dB
20.0 dB
Line Attenuation
59.0 dB
31.5 dB
Path Mode
Interleaved
Interleaved
Interleave Depth
32
4
Data Rate
4416 kbps
448 kbps
MAX Rate
4672 kbps
1068 kbps
POWER
19.5 dbm
12.0 dbm
INP
0.0 symbols
0.0 symbols
CRC
56
0

 

 Any help appreciated!!

12 REPLIES
Community Veteran
Posts: 38,246
Thanks: 934
Fixes: 56
Registered: 15-06-2007

Re: ADSL Speed limited to 150 kbps

This possibly isn't relevant as you may be on the new network but what is the Current Line Speed given here https://portal.plus.net/my.html?action=data_transfer_speed

ftb101
Hooked
Posts: 5
Registered: 08-01-2017

Re: ADSL Speed limited to 150 kbps

Hi oldjim,

 

The Current line speed:7.15 Mb according to that link, so I am guessing that the profile at Plusnet's end isn't stuck either.........

Community Veteran
Posts: 4,917
Thanks: 338
Fixes: 16
Registered: 10-06-2010

Re: ADSL Speed limited to 150 kbps

Have you tried re-connecting the PPP? Or even rebooting the router?

DS
Pro
Posts: 561
Thanks: 115
Fixes: 7
Registered: 06-01-2017

Re: ADSL Speed limited to 150 kbps

Not too sure what's meant by 'new network' but it does look like you may be in what's called a banded profile.

"no matter how I test" - does this include constantly rebooting the router? If so this wouldn't help and only increases the time it takes for the dlm to recover. If you have been switching it on and off, you'd be better off leaving the router on and left alone.

Should you be connecting over wifi, try ethernet and see if the results of speed tests increase to where you've seen them before.

PN should be able to give it a nudge in the right direction if it doesn't correct itself

Plusnet Staff
Plusnet Staff
Posts: 2,123
Thanks: 361
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Registered: 22-08-2015

Re: ADSL Speed limited to 150 kbps

Hello @ftb101

The data transfer rate of 150kB/s seems to be correct for the downstream throughput shown in your BTW speed test.

That's not to say it's a good speed though, as your router is indicating a sync rate of 4.4 Mbps.

Probably would try a reboot of the router if you haven't already.

Are you also connecting wired or wireless?
I've joined the Plusnet Help Team as of May 2017. As such, I have a new forum account. Please direct any queries to @Gandalf. Thanks

 Anoush Mortazavi
 Plusnet Support
Community Veteran
Posts: 4,917
Thanks: 338
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Registered: 10-06-2010

Re: ADSL Speed limited to 150 kbps

@DS

There is nothing to suggest this is a banded profile.

It's ADSL1 where banding as such does not exist, the clue is in the rounded 3.5 IP Profile.

ftb101
Hooked
Posts: 5
Registered: 08-01-2017

Re: ADSL Speed limited to 150 kbps

Hi ejs,

Yep, tried rebooting and also changing the PPP settings but still the same download speed... Sad

DS
Pro
Posts: 561
Thanks: 115
Fixes: 7
Registered: 06-01-2017

Re: ADSL Speed limited to 150 kbps

Thanks for that ejs. I've been 'away' from this sort of stuff for a while and had it in my head that 3.5 was one of the profiles... my bad.

ftb101
Hooked
Posts: 5
Registered: 08-01-2017

Re: ADSL Speed limited to 150 kbps

I would accept my download speed is 150 kbps IF I hadn't had a download speed of 300-350 kbps for the last two years!!

 

Edit: it's a wired connection by the way

Plusnet Staff
Plusnet Staff
Posts: 2,123
Thanks: 361
Fixes: 114
Registered: 22-08-2015

Re: ADSL Speed limited to 150 kbps

In this case, I would raise a fault to us at http://faults.plus.net as your downstream throughput of 1.25 Mbps seems pretty low for your sync of 4.4 Mbps. Especially on a wired connection.
I've joined the Plusnet Help Team as of May 2017. As such, I have a new forum account. Please direct any queries to @Gandalf. Thanks

 Anoush Mortazavi
 Plusnet Support
Community Veteran
Posts: 1,145
Thanks: 139
Fixes: 26
Registered: 13-08-2015

Re: ADSL Speed limited to 150 kbps

How are you testing, wired or WiFi, and with what?

ftb101
Hooked
Posts: 5
Registered: 08-01-2017

Re: ADSL Speed limited to 150 kbps

Hi Mustrum,

Testing via a wired connection, using BTW Performance Test.

 

I think I will raise this as a fault, as Anoush suggests.  Thanks for your help all Smiley