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Broadband speed deteriorating

kbturner
Grafter
Posts: 73
Registered: 09-08-2014

Broadband speed deteriorating

The following graph, derived from data from the thinkbroadband speedtest, shows my download speeds since August 8th, which was when my Plusnet account was activated.
Round about September 7th the speeds reached a plateau of around 6.5 to 7.0 Mbps, which I found pretty satisfactory, and substantially higher than I was getting from my previous ISP (Madasafish, Plusnet's sister company).
However, starting about October 17th a significant decline is apparent, and it now seems to be averaging between 6.0 and 6.5 Mbps.
Can anybody - or more specifically Plusnet staff - offer any explanation for this anomaly?
128 REPLIES
Community Veteran
Posts: 38,460
Thanks: 1,028
Fixes: 62
Registered: 15-06-2007

Re: Broadband speed deteriorating

The first thing is to post your router stats - noise margin, speed and attenuation
The sticky at the top of this board explains
kbturner
Grafter
Posts: 73
Registered: 09-08-2014

Re: Broadband speed deteriorating

OK, here's the stats from my Technicolor TG582n router (I've just spent ages trying - unsuccessfully - to format them into a table!):
Uptime: 19 days, 15:44:11
DSL Type: ITU-T G.992.1
Bandwidth (Up/Down) [kbps/kbps]: 448 / 7,904
Data Transferred (Sent/Received) [GB/GB]: 1.47 / 20.56
Output Power (Up/Down) [dBm]: 12.3 / 19.9
Line Attenuation (Up/Down) [dB]: 12.0 / 19.5
SN Margin (Up/Down) [dB]: 28.0 / 6.3
System Vendor ID (Local/Remote): TMMB / ----
Chipset Vendor ID (Local/Remote): BDCM / TSTC
Loss of Framing (Local/Remote): 9 / -
Loss of Signal (Local/Remote): 1 / -
Loss of Power (Local/Remote): 0 / -
Loss of Link (Remote): -
Error Seconds (Local/Remote): 4,354 / -
FEC Errors (Up/Down): 45 / 416,083
CRC Errors (Up/Down): 23 / 2,713
HEC Errors (Up/Down): - / 39,766
Community Veteran
Posts: 38,460
Thanks: 1,028
Fixes: 62
Registered: 15-06-2007

Re: Broadband speed deteriorating

Nothing too obvious there except the speeds dropped when your router resynched at about 6.00am so when it was still dark
Before doing anything else can you post the Currrent Line Speed from https://portal.plus.net/my.html?action=data_transfer_speed and also run the BT Speedtest using this link http://www.speedtest.btwholesale.com/PerformanceTesterWS/diagnostics.do and report back
The results should be 6,500kbps for both the current line speed and the BT IP profile
If neither of those show a problem then
I suggest - at about mid morning - going to here http://192.168.1.254/cgi/b/bb/?be=0&l0=2&l1=-1 and click on disconnect then leave it for a few minutes then disconnect the router from the phone line or reboot it. Once the broadband light is green you may need to click on connect again
That should give you a small increase in sync speed - please post the results as if you get more than 7,968kbps then you will get an increase in profile of 500kbps
However this won't affect your speed test results for several days to give the BT IP profile time to react.as you appear to be on 20CN
However as your line is interleaved this may not give an increase - we can only wait and see
The best you can possibly get is 8128 kbps
Can you also put your phone number in http://usertools.plus.net/exchanges/
and report what it says about WBC on 21CN
kbturner
Grafter
Posts: 73
Registered: 09-08-2014

Re: Broadband speed deteriorating

Current line speed is indeed 6.5Mb from both sources.
"BT have not advised a planned date for WBC on 21CN"
I will reboot the router as requested and report back later.
Thanks for your help so far.
kbturner
Grafter
Posts: 73
Registered: 09-08-2014

Re: Broadband speed deteriorating

Router reboot completed:
Uptime: 0 days, 0:09:56
DSL Type: ITU-T G.992.1
Bandwidth (Up/Down) [kbps/kbps]: 448 / 7,936
Data Transferred (Sent/Received) [kB/kB]: 46.41 / 54.55
Output Power (Up/Down) [dBm]: 12.1 / 19.8
Line Attenuation (Up/Down) [dB]: 12.0 / 19.5
SN Margin (Up/Down) [dB]: 28.0 / 6.2
System Vendor ID (Local/Remote): TMMB / ----
Chipset Vendor ID (Local/Remote): BDCM / TSTC
Loss of Framing (Local/Remote): 0 / -
Loss of Signal (Local/Remote): 0 / -
Loss of Power (Local/Remote): 0 / -
Loss of Link (Remote): -
Error Seconds (Local/Remote): 0 / -
FEC Errors (Up/Down): 0 / 55
CRC Errors (Up/Down): 0 / 0
HEC Errors (Up/Down): - / 0
Thinkbroadband speed test reports 6.28 Mbps
Current line speed still 6.5Mb from both sources
Plusnet Help Team
Plusnet Help Team
Posts: 1,953
Thanks: 22
Fixes: 4
Registered: 24-07-2014

Re: Broadband speed deteriorating

Hi and thanks for the info kbturner,
Your graph matches our details perfectly. You are syncing at 7.9Mbit at the moment but the bRAS profile seems to be stuck at 6500k, this should have increased (I can't currently see the historic data I want) for you back to the 7500k that you previously had.
If this remains at this level, I'll have BT reset it for you.
Tony
If this post resolved your issue please click the 'This fixed my problem' button
 Tony T
 Plusnet Help Team
Community Veteran
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Registered: 15-06-2007

Re: Broadband speed deteriorating

@Tony
You are not correct in what you say - the IP profile is absolutely correct for the sync rate on a 20CN connection and there is no 7,500kbps IP profile either so it can't have been that ever
@kbturner
damn - it hasn't pushed the sync speed high enough to trigger the next higher profile so I suspect that you are stuck with it
Community Veteran
Posts: 19,101
Thanks: 443
Fixes: 21
Registered: 31-08-2007

Re: Broadband speed deteriorating

Well, except Jim, that's a lower than expected sync speed for that attenuation, it ought to be 8128 with a 7.15Mbps profile.
Probably best to go through a few basics as I've just suggested for someone else.
@kbturner
Do you normally leave the modem/routert on 24/7 or switch off periodically?
Can you hear/have you heard any crackling or other noises on the line when using the phone? Have you had any problems with incoming or outgoing calls? Dial 17070 select option 2 for the Quiet Line Test.
Do you have any extension phone sockets, and where are you currently plugged in?
If a CRT member (Tony perhaps) reads the thread, a Vis. Radius could be very useful.
Community Veteran
Posts: 38,460
Thanks: 1,028
Fixes: 62
Registered: 15-06-2007

Re: Broadband speed deteriorating

Please see reply 2
Quote
Uptime:  19 days, 15:44:11
Community Veteran
Posts: 19,101
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Registered: 31-08-2007

Re: Broadband speed deteriorating

Ok, that only answers one of the questions, sometimes I forget to edit out one that isn't required from my standard set  Roll eyes
Community Veteran
Posts: 38,460
Thanks: 1,028
Fixes: 62
Registered: 15-06-2007

Re: Broadband speed deteriorating

so why would the radius log be useful
Community Veteran
Posts: 19,101
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Registered: 31-08-2007

Re: Broadband speed deteriorating

To see if there have been any PPP drops Roll eyes   which may help point a finger in the direction of the possible cause of these lower speeds.
Community Veteran
Posts: 38,460
Thanks: 1,028
Fixes: 62
Registered: 15-06-2007

Re: Broadband speed deteriorating

why would a PPP drop affect the speeds when there hasn't been a connection drop
Community Veteran
Posts: 19,101
Thanks: 443
Fixes: 21
Registered: 31-08-2007

Re: Broadband speed deteriorating

I DIDN'T say it DID! I said it may help point a finger (in other words "or eliminate a possibility"). I think this conversation should have been done by PM, you are distracting from the more important things I mentioned in reply #8