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Standard User Kamil
(newbie) Tue 26-Aug-14 19:33:33
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FTTc install to present.


[link to this post]
 
Hi. Just wanted to share with you.

I got my connection 40/10 installed on the 5th of June. Initial speed at about 650-700 m from cab was satisfying going from 3,5 on adsl to 37,4 on fibre (download). Ping was excellent at 6ms. Week later I got first indication that something was going on smile Pings up to 16ms and speed down to 33.

Since then..

It has been fairly stable in the meantime no drops and speeds + ping stayed solid in place. I have purchased hg612 also so I could monitor the line... This prompted me to further investigation. Although bt checker and tt estimate my line speed at around 36 I found various references to the speed possible of around 60meg at this distance from cab. Once with stats I could see my SNR going up and down like a yoyo (if I turned on tv + sky instatnly I lost 3meg of max attainable 41 down to 38) down to 4db and below. It was weird to see. I could also see some errors but dlm was not doing much with it so I thought to leave it and see wheather interleaving would get turned off. 7 days later nothing happened and fluctuation still occurs.

I have thought of the wiring in my house. As when the bt man came he did in fact move my master to another room thus extending the copper circut. At the time he had problems with getting signal in the newely installed socket. I thought at the time `hey you the expert so make it work` which he did in the end and went on his way. I always had a doubt tho. Has he done everything correctly as he should have? So today I have read an article about polarity.. Is it important which way around the cables connect? It never was on dsl is it on fibre?

Anyway I swopped the pair around and now my router shows snr of 8,2db (8,1 if i Turn on tv + sky) My max attainable went up from 39 today to 53 in an instant. Could the engineer cause my connection to not be set up correctly off the bat? Am I clutching at straws here and merely re-sitting the pair in the socket did the trick?

Oh and there is almost no errors whatsoever after over two hours of connection being up smile
I hope now dlm will turn this damn interleaving off also but I guess I will have to wait some time for this to happen.

Can someon please tell me if my interleaving depth is substantial or fairly small?

xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 0
Max: Upstream rate = 16100 Kbps, Downstream rate = 53004 Kbps
Path: 0, Upstream rate = 9999 Kbps, Downstream rate = 39996 Kbps

Link Power State: L0
Mode: VDSL2 Annex B
VDSL2 Profile: Profile 17a
TPS-TC: PTM Mode
Trellis: U:ON /D:ON
Line Status: No Defect
Training Status: Showtime
Down Up
SNR (dB): 8.2 11.0
Attn(dB): 0.0 0.0
Pwr(dBm): 13.3 7.6
VDSL2 framing
Path 0
B: 57 236
M: 1 1
T: 64 23
R: 16 16
S: 0.0461 0.7543
L: 12835 2694
D: 701 1
I: 74 127
N: 74 254
Counters
Path 0
OHF: 3473864 890122
OHFErr: 0 0
RS: 666981529 2279310
RSCorr: 1327 0
RSUnCorr: 0 0

Path 0
HEC: 0 0
OCD: 0 0
LCD: 0 0
Total Cells: 593751450 0
Data Cells: 10520027 0
Drop Cells: 0
Bit Errors: 0 0

ES: 0 0
SES: 0 0
UAS: 22 22
AS: 7719

Path 0
INP: 3.00 0.00
PER: 2.21 8.67
delay: 8.00 0.00
OR: 86.72 59.02

Bitswap: 142 3

Total time = 2 hours 9 min 4 sec
FEC: 1327 0
CRC: 0 0
ES: 0 0
SES: 0 0
UAS: 22 22
LOS: 0 0
LOF: 0 0
Latest 15 minutes time = 9 min 4 sec
FEC: 422 0
CRC: 0 0
ES: 0 0
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
Previous 15 minutes time = 15 min 0 sec
FEC: 0 0
CRC: 0 0
ES: 0 0
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
Latest 1 day time = 2 hours 9 min 4 sec
FEC: 1327 0
CRC: 0 0
ES: 0 0
SES: 0 0
UAS: 22 22
LOS: 0 0
LOF: 0 0
Previous 1 day time = 0 sec
FEC: 0 0
CRC: 0 0
ES: 0 0
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
Since Link time = 2 hours 8 min 39 sec
FEC: 1327 0
CRC: 0 0
ES: 0 0
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0

Edited by Kamil (Tue 26-Aug-14 19:39:24)

Standard User BatBoy
(legend) Tue 26-Aug-14 20:24:48
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Re: FTTc install to present.


[re: Kamil] [link to this post]
 
It looks like you've fixed it. DLM should relent within 10 days if you have.


______________________________________________________________________________________False_Authority_Syndrome__________________
Standard User b4dger
(knowledge is power) Wed 27-Aug-14 09:12:36
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Re: FTTc install to present.


[re: Kamil] [link to this post]
 
In reply to a post by Kamil:
Anyway I swopped the pair around and now my router shows snr of 8,2db (8,1 if i Turn on tv + sky) My max attainable went up from 39 today to 53 in an instant. Could the engineer cause my connection to not be set up correctly off the bat? Am I clutching at straws here and merely re-sitting the pair in the socket did the trick?
Interesting as I'm just about to 'go' FTTC on a 600m line smile

You could always swap things back and compare stats - that will show you if it was just you making a cleaner connection or not.


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Standard User youngsyp
(member) Wed 27-Aug-14 10:26:47
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Re: FTTc install to present.


[re: Kamil] [link to this post]
 
I'd be a little worried if an 'engineer' struggled to get a connection after simply adding a data extension socket. It's hardly rocket surgery connecting two wires together.

If you do some reading around polarity, you'll note that it was important with legacy connections like dial up as equipment could be sensitive to it. By all accounts, it wasn't important with ADSL but, I've always made sure I observed the correct polarity whenever I've wired up a master socket.
Regardless of whether that was the cause of your issue, it seems as though you've fixed your problem. Good news!

Paul

ISP: Xilo
Service: Talk & Surf 100
Exchange: SMYG
Cabinet: 4
MSAN: Broadcom
Router: Billion BiPac 7800N
Attenuation:38.5dB - 40dB (weather dependent)
Target SNRM: 3.3dB or 53% of ISP
Current sync: 9823kbps
FTTC cab in place but not enabled..... yet!
Standard User AndyPandy
(experienced) Wed 27-Aug-14 11:47:52
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Re: FTTc install to present.


[re: youngsyp] [link to this post]
 
Are you talking about swapping the actual pair coming in from the street?

I thought that we weren't allowed to touch these (and they carry voltage)...


ZeN Office
Fritz!Box 3390
Standard User youngsyp
(member) Wed 27-Aug-14 13:50:08
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Re: FTTc install to present.


[re: AndyPandy] [link to this post]
 
Yes, I was referring to the 'drop wire'.

And yes again you are correct to a degree. 'Interfering' with the 'street' side of the master socket goes against the end users terms of service agreement with BTOR. In reality however, this would only cause an issue if a fault was raised and OR found it was the end users interference that caused it. The end user would then be liable for the OR call out charge.
OR are exceptionally unlikely to trace this back to the end user if all they did was remove, switch polarity and re-punch down the drop wire in the master socket. That being said, if you're not willing to accept the possible repercussions, you shouldn't interfere with the 'street' side of the cabling.

The wiring itself carries circa 50v DC. Enough to give you a buzz but, not threaten your life.

Paul

ISP: Xilo
Service: Talk & Surf 100
Exchange: SMYG
Cabinet: 4
MSAN: Broadcom
Router: Billion BiPac 7800N
Attenuation:38.5dB - 40dB (weather dependent)
Target SNRM: 3.3dB or 53% of ISP
Current sync: 9823kbps
FTTC cab in place but not enabled..... yet!

Edited by youngsyp (Wed 27-Aug-14 13:53:11)

Standard User Zarjaz
(knowledge is power) Wed 27-Aug-14 18:45:43
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Re: FTTc install to present.


[re: youngsyp] [link to this post]
 
Polarity is only important after the master socket, so no need to touch anything before it any way.

Standard User MHC
(sensei) Wed 27-Aug-14 18:51:46
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Re: FTTc install to present.


[re: youngsyp] [link to this post]
 
50V can kill and has done before. There is also 75v ring which certainly can give you a large kick.


~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

M H C


taurus excreta cerebrum vincit
Standard User awontroba
(newbie) Wed 27-Aug-14 19:27:11
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Re: FTTc install to present.


[re: MHC] [link to this post]
 
In reply to a post by MHC:
50V can kill and has done before. There is also 75v ring which certainly can give you a large kick.

Its the volts that jolts but the mills that kills.
I recall reading of somebody being killed by falling on a 12v car battery, so hard that the terminals punctured the skin on his chest and the current stopped his heart.
I have had a nasty jolt from having my fingers in the wiring when a phone rang.

--
Adrian
Standard User Kamil
(newbie) Wed 27-Aug-14 20:50:39
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Re: FTTc install to present.


[re: b4dger] [link to this post]
 
In reply to a post by b4dger:
You could always swap things back and compare stats - that will show you if it was just you making a cleaner connection or not.


I think I will leave it alone for a while and see if interleaving will get switched off smile

SNR staying at 8 so far so much better than previous fluctuation from 6 to 4. Max attainable still better by 12meg than previously.
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