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Anonymous
(Unregistered)Sun 09-Sep-12 02:53:49
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BT Infinity - Profile reset, fault still exists?


[link to this post]
 
Hi,

I recently had BT infinity installed, in the first day or two I noticed that I had huge HEC errors in the around 10-15k.

After 24-48 hours my sync dropped and noticed that I had interleaving turned on, after the 10 day training period I've had 2 engineers around so far attempting to find a fault on my line.

The first engineer replaced the "drop" cable and the second engineer that came could not find any fault but rang openreach to reset my profile as I wanted interleaving turned off.

24 hours passed TBB Ping monitor noticed constant packetloss during this period and after 24 hours again my line dropped and re-syned which turned on interleaving again!!

When interleave is turned on I get around 45-60ms pings during peak times which I feel is too high for gaming and want it turned off.

Does interleave indicate a fault on the line? I really don't want interleaving turned on, I spoke to BT but they cannot turn it off only reset the profile which would require another BT engineer.

I feel it's pointless engineer after engineer coming to reset my profile as after 24 hours it turned it back on, while interleaving is off TBB notices constant packet loss.

I'm 1.97km away from the exchange

Here are my stats at present:

# xdslcmd info --show
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 2
Max: Upstream rate = 30893 Kbps, Downstream rate = 90996 Kbps
Path: 0, Upstream rate = 20000 Kbps, Downstream rate = 76533 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): 6.4 15.1
Attn(dB): 0.0 0.0
Pwr(dBm): 13.4 6.8
VDSL2 framing
Path 0
B: 63 237
M: 1 1
T: 64 45
R: 16 16
S: 0.0266 0.3782
L: 24051 5373
D: 1213 1
I: 80 127
N: 80 254
Counters
Path 0
OHF: 58264924 1787578
OHFErr: 40 123
RS: 2596979266 4186254
RSCorr: 25946524 1251
RSUnCorr: 701 0

Path 0
HEC: 421 0
OCD: 0 0
LCD: 0 0
Total Cells: 2401484363 0
Data Cells: 2032158 0
Drop Cells: 0
Bit Errors: 0 0

ES: 49038 210
SES: 86 0
UAS: 1521 1521
AS: 74714

Path 0
INP: 3.00 0.00
PER: 1.27 4.25
delay: 8.00 0.00
OR: 131.52 60.17

Bitswap: 26257 9567

Thanks in advance
Anonymous
(Unregistered)Sun 09-Sep-12 02:55:21
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Re: BT Infinity - Profile reset, fault still exists?


[re: Anonymous] [link to this post]
 
These were the stats a few hours after the engineer had reset my profile:

BusyBox v1.9.1 (2010-10-15 17:59:06 CST) built-in shell (ash)
Enter 'help' for a list of built-in commands.

# xdslcmd info --show
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 2
Max: Upstream rate = 30789 Kbps, Downstream rate = 86588 Kbps
Path: 0, Upstream rate = 20000 Kbps, Downstream rate = 79999 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): 7.8 15.0
Attn(dB): 0.0 0.0
Pwr(dBm): 13.5 6.8
VDSL2 framing
Path 0
B: 239 237
M: 1 1
T: 23 45
R: 0 16
S: 0.0955 0.3782
L: 20107 5373
D: 1 1
I: 240 127
N: 240 254
Counters
Path 0
OHF: 3797469 1476143
OHFErr: 39623 7
RS: 0 1986160
RSCorr: 0 12
RSUnCorr: 0 0

Path 0
HEC: 3150 0
OCD: 0 0
LCD: 0 0
Total Cells: 965702438 0
Data Cells: 3499216 0
Drop Cells: 0
Bit Errors: 0 0

ES: 4392 8
SES: 22 0
UAS: 1504 1504
AS: 6279

Path 0
INP: 0.00 0.00
PER: 1.64 4.25
delay: 0.00 0.00
OR: 116.56 60.17

Bitswap: 1613 589

#
Standard User tommy45
(knowledge is power) Sun 09-Sep-12 03:46:23
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Re: BT Infinity - Profile reset, fault still exists?


[re: Anonymous] [link to this post]
 
There is little that you can do, as BT will not disable DLM or allow a connection to be configured how the end user wants it ,Sounds like you have a bad D'side pair, if not then it suffers from some form of outside interference
That's the thing with BT if your vdsl /adsl service works fine then all well and good, you will get a reasonable standard of service, but should you be unfortunate enough to be allocated a line that has problems with interference or is of low quality , then your stuffed as their DLM ect will apply all that kak kar that gives high latency and lower than optimal sync speeds , it's IMO mainly used to stem support calls, By masking the problem


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Standard User Zarjaz
(knowledge is power) Sun 09-Sep-12 08:19:10
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Re: BT Infinity - Profile reset, fault still exists?


[re: Anonymous] [link to this post]
 
Keep reporting it, simple as that. Painful, but with enough visits, you will get an engineer who will look a little further. Looks like you are on a nice short D-side, hence the full sync. When the next engineer comes, get them to run a manual test (not the scripted version) see if this shows the errors, if it does, they should chase this. Have either of them swapped out the modem and/or the router ? Did either check for REIN ?

Anonymous
(Unregistered)Sun 09-Sep-12 13:59:06
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Re: BT Infinity - Profile reset, fault still exists?


[re: Zarjaz] [link to this post]
 
Thanks I'll report it again and call them, does this definitely mean there's a fault on the line if interleave is switched on?
Standard User Zarjaz
(knowledge is power) Sun 09-Sep-12 14:27:59
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Re: BT Infinity - Profile reset, fault still exists?


[re: Anonymous] [link to this post]
 
does this definitely mean there's a fault on the line if interleave is switched on?

No. But all those errors mean something isn't right.

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