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Guru
Guru
315 Views
Message 31 of 43

Re: Possible Fault

Day 5 In the TEST SOCKET:

 

The noise margin has stayed around 3dB - 4dB, Latency still set as Fast.

I will be reconnecting the homehub to the new Openreach "vdsl" master socket, and seeing if the problem comes back (but hopefully not Smiley Very Happy )

 

Hub Stats from test socket:

Connection Information
Line state:Connected
Connection time:3 days, 08:17:17
Downstream:1.656 Mbps
Upstream:448 Kbps
 
ADSL Settings
VPI/VCI:0/38
Type:PPPoA
Modulation:G.992.1 Annex A
Latency type:Fast
Noise margin (Down/Up):3.4 dB / 10.0 dB
Line attenuation (Down/Up):65.6 dB / 31.5 dB
Output power (Down/Up):16.7 dBm / 12.5 dBm
FEC Events (Down/Up):0 / 12
CRC Events (Down/Up):9507 / 2640
Loss of Framing (Local/Remote):0 / 0
Loss of Signal (Local/Remote):0 / 0
Loss of Power (Local/Remote):0 / 0
HEC Events (Down/Up):18342 / 3
Error Seconds (Local/Remote):2176 / 1229

 

Cheers


jac_95 | BT.com Help Site | BT Service Status
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Guru
Guru
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Message 32 of 43

Re: Possible Fault

I have now replaced the faceplate to the new master socket ( have to say was quit fiddly compared to the previous adsl filtered master socket :L )

 

I have also tried dialling 17070 and the noise margin stayed about the same, with not much of an increase in errors.

 

New stats from Master Socket:

Connection Information
Line state:Connected
Connection time:0 days, 00:06:50
Downstream:1.625 Mbps
Upstream:448 Kbps
 
ADSL Settings
VPI/VCI:0/38
Type:PPPoA
Modulation:G.992.1 Annex A
Latency type:Fast
Noise margin (Down/Up):6.3 dB / 10.0 dB
Line attenuation (Down/Up):65.6 dB / 31.5 dB
Output power (Down/Up):16.7 dBm / 12.5 dBm
FEC Events (Down/Up):0 / 1
CRC Events (Down/Up):6 / 1
Loss of Framing (Local/Remote):0 / 0
Loss of Signal (Local/Remote):0 / 0
Loss of Power (Local/Remote):0 / 0
HEC Events (Down/Up):3 / 0
Error Seconds (Local/Remote):5 / 1
 

 


Lets see what happens Smiley Very Happy

 

Cheers


jac_95 | BT.com Help Site | BT Service Status
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Guru
Guru
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Message 33 of 43

Re: Possible Fault

Just over 27 hours with the homehub connected to the Master socket and everything else connected as normal.

 

The noise margin stays about the same when using the landline phone. The latency is still set to fast.

Also liking how the line attenuation has decreased by about 1dB since the engineer visit Smiley LOL

 

So I have no idea what had caused the fault, but all seems to have been fixed. Hopefully Smiley Very Happy

 

Here's the stats:

Line state:Connected
Connection time:1 days, 03:11:10
Downstream:1.625 Mbps
Upstream:448 Kbps
 
ADSL Settings
VPI/VCI:0/38
Type:PPPoA
Modulation:G.992.1 Annex A
Latency type:Fast
Noise margin (Down/Up):5.0 dB / 10.0 dB
Line attenuation (Down/Up):65.6 dB / 31.5 dB
Output power (Down/Up):16.7 dBm / 12.5 dBm
FEC Events (Down/Up):0 / 1
CRC Events (Down/Up):4906 / 673
Loss of Framing (Local/Remote):0 / 0
Loss of Signal (Local/Remote):0 / 0
Loss of Power (Local/Remote):0 / 0
HEC Events (Down/Up):3538 / 0
Error Seconds (Local/Remote):648 / 318

 

Cheers


jac_95 | BT.com Help Site | BT Service Status
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Guru
Guru
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Message 34 of 43

Re: Possible Fault

Haha sorry another stats update :L

 

Just over 49 hours in the Openreach (VDSL) master socket with everything connected as normal. Snr staying about the same when using the phone 🙂

 

Here's the stats:

Line state:Connected
Connection time:2 days, 01:08:00
Downstream:1.625 Mbps
Upstream:448 Kbps
 
ADSL Settings
VPI/VCI:0/38
Type:PPPoA
Modulation:G.992.1 Annex A
Latency type:Fast
Noise margin (Down/Up):6.0 dB / 10.0 dB
Line attenuation (Down/Up):65.6 dB / 31.5 dB
Output power (Down/Up):16.7 dBm / 12.5 dBm
FEC Events (Down/Up):0 / 3
CRC Events (Down/Up):5324 / 1564
Loss of Framing (Local/Remote):0 / 0
Loss of Signal (Local/Remote):0 / 0
Loss of Power (Local/Remote):0 / 0
HEC Events (Down/Up):3768 / 1
Error Seconds (Local/Remote):

1019 / 677

 

 

Cheers.


jac_95 | BT.com Help Site | BT Service Status
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Guru
Guru
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Message 35 of 43

Re: Possible Fault

Just over 97 hours with the home hub connected to the master socket as normal.

The snr has slowly gone to a target of 3dB on Fast latency.

There have been no problems with the snr dropping and errors increase alot when using the phone. The snr stays about the same when on the phone.

 

Thinking the latency type may change from fast to interleaved soon Smiley Very Happy

 

Stats from "vdsl" master socket:

Line state:Connected
Connection time:4 days, 01:20:47
Downstream:1.625 Mbps
Upstream:448 Kbps
 
ADSL Settings
VPI/VCI:0/38
Type:PPPoA
Modulation:G.992.1 Annex A
Latency type:Fast
Noise margin (Down/Up):3.2 dB / 10.0 dB
Line attenuation (Down/Up):65.6 dB / 31.5 dB
Output power (Down/Up):16.7 dBm / 12.5 dBm
FEC Events (Down/Up):0 / 470
CRC Events (Down/Up):59010 / 4024
Loss of Framing (Local/Remote):0 / 0
Loss of Signal (Local/Remote):0 / 0
Loss of Power (Local/Remote):0 / 0
HEC Events (Down/Up):12498 / 4
Error Seconds (Local/Remote):31152 / 1839

 

Cheers

 


jac_95 | BT.com Help Site | BT Service Status
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Guru
Guru
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Message 36 of 43

Re: Possible Fault

Hi all,

 

It's now been 6 days, 06:29:58 with every thing connected as normal and using the vdsl master socket. All's been fine with the phone and snr and that.

However today I have noticed that the webpages seem to slowly load and that BBC iPlayer and Youtube doesn't seem to want to play but saying "insufficient bandwidth".

I think this maybe due to the number of errors being built up on the line over the last 6days due to the latency being set to fast.

 

any ideas? maybe get it back to interleaved?

 

SpeedTests:

 

1) BBC iPlayer speedtest:

bbcspeedtest.png

 

2) BT Wholesale speed test:

DL: 1.06mbps

UL: 0.36mbps

Ping: 40.38ms

IP Profile: Not working

 

3) Thinkbroadband Speedtest:

 

Stats:

Line state:Connected
Connection time:6 days, 06:29:58
Downstream:1.625 Mbps
Upstream:448 Kbps
 
ADSL Settings
VPI/VCI:0/38
Type:PPPoA
Modulation:G.992.1 Annex A
Latency type:Fast
Noise margin (Down/Up):3.1 dB / 10.0 dB
Line attenuation (Down/Up):65.6 dB / 31.5 dB
Output power (Down/Up):16.7 dBm / 12.5 dBm
FEC Events (Down/Up):0 / 874
CRC Events (Down/Up):2452963 / 6460
Loss of Framing (Local/Remote):0 / 0
Loss of Signal (Local/Remote):0 / 0
Loss of Power (Local/Remote):0 / 0
HEC Events (Down/Up):382098 / 125
Error Seconds (Local/Remote):247094 / 4616

 

 

Cheers


jac_95 | BT.com Help Site | BT Service Status
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Distinguished Sage
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Message 37 of 43

Re: Possible Fault

Personally I would go for Interleaving
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astar27
Expert
224 Views
Message 38 of 43

Re: Possible Fault

are you on a 21CN circuit? just on a 20CN profile still? ie is your ip profile never the same if you reconnect.
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Guru
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Message 39 of 43

Re: Possible Fault

On that loop loss on a Max connection jac .... you really need the interleave, which incidently will probably apply itself automatically in due course.

 

Running a 3db margin at night will be causing the poor throughput, as the bitloading will be poor, that is why the line rates are not good at night.

Your connection will have been reset, and thus that is why you're running fastpath and with a low margin.

To get the noise margin back to 6db, do a reset at NIGHT when the bitloading is poor. What will happen is the connection sync speed will drop marginally, but the margin will come back in, and the line will bitload at night.

Then let the line errors change the fastpath mode to interleave automatically, when its ready.

 

It's far better to have a slightly depleted linespeed that works day and night, rather than the best sync rate that only bitloads during the daylight hours.

 

If and when it's trained a while and shifted to interleave, and in DAYLIGHT hours .... do a reset then, and you'll find it'll increase a little, maintain the normal target margin of 6db, and at night drop to a lesser degree than it is presently.

 

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Guru
Guru
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Message 40 of 43

Re: Possible Fault

@john46 thanks, yes it was on Interleaved before until the Openreach Broadband Boost Engineer tested the line and fitted a VDSL master socket. I was hoping that the dlm would have picked up that there were a few errors building up and would have automatically changed it back to Interleaved :L

 

@astar27 yes I am on the BTw 21cn network, but still on adslmax (20cn profile). Was upgraded to the 21cn network about 9 months ago. You can see my ADSL2+ on long lines thread here: Click

 

@RogerB haha ye thought the line latency should be set to interleave. It changed to fast recently after the broadband boost engineer visit. Was hoping that it would automatically change back.

Will try what you have said tonight and will see what happens.

 

Thanks all.

 

Best regards.

jac_95


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