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Standard User mrmarktigger
(regular) Mon 02-Sep-19 19:16:20
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Falling Sync Rate on Superfast2 FTTC


[link to this post]
 
Hi Everyone,
Up until around April 2019 I had the full 80/20 Sync on voda superfast 2 for almost a full year.
Since then the download sync has been suddenly dropping in stages by 3 or 4 mbit/s every few weeks and is now at 62/20.

It did once peak back up to 70/20 about a month ago, but after a power cut which lasted for a few hours it returned to 62/20 when the power returned.

I've tried the voda tech support route, but found they are no more helpful than Garfield, my pet cat smile

So by the looks of it, it's self help and asking for advice from others until my contract ends in November.

So i've tried another all in one router/modem, a TP-Link TD-W9970 in the BT Master socket with brand new filter and it's still the same so far. I have copy/pasted the (maybe limited) stats at the end of this message.

Please could anyone help or advise?


[email protected]:~$ telnet 192.168.1.1
Trying 192.168.1.1...
Connected to 192.168.1.1.
Escape character is '^]'.

username:admin
password:
-----------------------------------------------------------------------------------------------------------------------------------------------------------
Welcome To Use TP-LINK COMMAND-LINE Interface Model.
-----------------------------------------------------------------------------------------------------------------------------------------------------------
TP-LINK(conf)#adsl

adsl show info

adsl show status
cmd:SUCC
TP-LINK(conf)#adsl show status

INDEX=1
{
enable=1
status=Up
dataPath=
lineNumber=0
lineEncoding=
modulationType=VDSL2
interleaveDepth=0
X_TP_AnnexType=Annex A/L
}
cmd:SUCC
TP-LINK(conf)#
[email protected]:~$ telnet 192.168.1.1
Trying 192.168.1.1...
Connected to 192.168.1.1.
Escape character is '^]'.

username:admin
password:
-----------------------------------------------------------------------------------------------------------------------------------------------------------
Welcome To Use TP-LINK COMMAND-LINE Interface Model.
-----------------------------------------------------------------------------------------------------------------------------------------------------------
TP-LINK(conf)#adsl

adsl show info

adsl show status
cmd:SUCC
TP-LINK(conf)#adsl show info

INDEX=1
{
enable=1
X_TP_DisableAELEM=0
status=Up
linkEncapsulationRequested=
linkEncapsulationUsed=G.993.2_Annex_K_PTM
modulationType=VDSL2
lineEncoding=
allowedProfiles=8a,8b,8c,8d,12a,12b,17a,30a
currentProfile=17a
X_TP_VDSLProfiles_8a=1
X_TP_VDSLProfiles_8b=1
X_TP_VDSLProfiles_8c=1
X_TP_VDSLProfiles_8d=1
X_TP_VDSLProfiles_12a=1
X_TP_VDSLProfiles_12b=1
X_TP_VDSLProfiles_17a=1
X_TP_VDSLProfiles_30a=0
dataPath=
interleaveDepth=0
lineNumber=0
upstreamCurrRate=20000
downstreamCurrRate=62329
upstreamMaxRate=23564
downstreamMaxRate=75242
upstreamNoiseMargin=68
downstreamNoiseMargin=63
upstreamAttenuation=179
downstreamAttenuation=95
upstreamPower=35
downstreamPower=36
usNegBandPlanDiscPresentation=3
dsNegBandPlanDiscPresentation=3
SATNus=1,177,278,1023,1023
SATNds=123,219,354,1023,1023
LATNus=2,179,279,1023,1023
LATNds=95,221,354,1023,1023
SNRMarginus=68,71,67,-512,-512
SNRMarginds=62,63,62,-512,-512
transmitPowerUs=-67,-299,31,-1281,-1281
transmitPowerDs=101,74,74,-1281,-1281
ATURVendor=
ATURCountry=
ATUCVendor=
ATUCCountry=
totalStart=92279
showtimeStart=92253
quarterHourStart=0
X_TP_Bitswap=On
X_TP_SRA=Off
X_TP_AdslModulationCfg=Multimode
X_TP_AnnexType=Annex A/L
X_TP_SupportAdslMode=VDSL2:A;T1.413:A;G.lite:A;G.dmt:A;ADSL2:A,A/L;ADSL2+:A,M,A/L/M;Auto Sync-up:A,A/L,M,A/L/M
}
cmd:SUCC
TP-LINK(conf)#

Edited by mrmarktigger (Mon 02-Sep-19 19:24:58)

Standard User mrmarktigger
(regular) Mon 02-Sep-19 21:31:55
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Re: Falling Sync Rate on Superfast2 FTTC


[re: mrmarktigger] [link to this post]
 
P.S.

I forgot to ask, I have another VDSL2 Zyxel all in one router/modem to try later. I know their are some very knowledgeable folk on this forum which I am sure will be able to help / advise.

So could I please also ask the questions, whats the best way to change over from this router to the new router without the DLM knocking my sync rate down any further?

Is it best to power the new one up in advance and swap the DSL leads quickly? Power the old one down, disconnect, wait while, connect the new one and power on a while later? If so how long?

Any advice would be very much appreciated.

Many thanks in advance.
Administrator MrSaffron
(staff) Mon 02-Sep-19 23:35:04
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Re: Falling Sync Rate on Superfast2 FTTC


[re: mrmarktigger] [link to this post]
 
Out of practice on the VDSL2 stats game, but it might just be you are seeing more cross talk as more people sign up in the area. Given speeds improved for a short while after a power cut suggests thats the case.

As for DLM - I've never panicked much just turn stuff off change leads around and turn on. The one switch off should not trigger DLM unless there are other errors building up that might trigger it.

The author of the above post is a thinkbroadband staff member. It may not constitute an official statement on behalf of thinkbroadband.


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Standard User mrmarktigger
(regular) Tue 03-Sep-19 20:58:30
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Re: Falling Sync Rate on Superfast2 FTTC


[re: MrSaffron] [link to this post]
 
Many thanks Mr Saffron.

About the power cut. I probably didn't describe that very well.

It went up to 70 mbit/s a few days before the power cut.
Then fell to 62 mbit/s after.

===================================



DSL Modulation Type:VDSL2

Annex Type:Annex A/L

Upstream Downstream
Current Rate (Kbps) 20000 62329
Max Rate (Kbps) 23512 75161
SNR Margin (dB) 6.8 6.3
Line Attenuation (dB) 17.9 9.5
Errors (Pkts) 0 0

Edited by mrmarktigger (Tue 03-Sep-19 22:03:44)

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