Broadband Related > FTTC and FTTP Issues
Slow line after outage
DeluxeParrot:
Over a week ago both my phone and broadband went down and I tracked the problem back to the extension wiring punched into the NTE5A face plate coming loose. I have fixed this but my broadband speed was syncing really low. Since last sunday I've been running exclusively from the test socket of the NTE5A so my internal wiring is ruled out.
I usually sync around 37 down, 6 up. Initially it was syncing at 5 down with a massive SNR margin. After 2 days of uptime it resynced at 20, with an snr margin of 15db.
My ISP has sent a replacement router/filter etc and I've been using that since Thursday and a DLM reset was performed on Friday after they apparently saw that it had capped me.
I know the cabinet I'm on (ECI) was full last year and they have put in an extra one about 6 months ago.
Here's the stats I've been collecting:
Technicolor TG589vn V3 (my usual isp provided modem):
--- Code: ---xdsl info expand=enabled
Physical Layer Statistics:
Modem state: up
Up time (Days hh:mm:ss): 1 day, 5:14:19
xDSL Standard: ITU-T G.993.2 Annex B (VDSL2)
Channel Mode: Interleaved
Number of reset: 1
Chipset Vendor info (G.994.1): Local Remote
Country code: B500 B500
ID: BDCM IFTN
Specific: 0000 B206
System Vendor info (showtime): Local Remote
Country code: 0F00 0000
ID: TMMB ----
Specific: 3C61 0000
Bearers generic info DS US
Payload rate [kbps]: 22399 7260
Attenuation [dB]: 14.8 2.2
Margins [dB]: 14.6 6.3
Output power [dBm]: 5.4 5.4
Number of bearers: 1
Bearer 0 DS US
INP [DMT symbols]: 3.00 0.00
Delay [ms]: 8.00 0.00
Depth []: 393 0.00
R: 16 0
G.997.1 Statistics (Current):
Failures:
Line failures Near end
Loss of signal (LOS): 1
Loss of frame (LOF): 10
Loss of power (LPR): 0
Performance monitoring:
Line PM: Near end
Error second (ES): 11
Channel PM: Near end Far end
Bearer 0:
Code Violation (CV): 0 0
FEC: 34380 0
ATM data path PM: Near end Far end
Bearer 0:
HEC violation count (HEC): 0 N/A
G.997.1 Statistics (last 15 minutes):
Failures:
Line failures Near end
Loss of signal (LOS): 0
Loss of frame (LOF): 0
Loss of power (LPR): 0
Performance monitoring:
Line PM: Near end
Error second (ES): 0
Channel PM: Near end Far end
Bearer 0:
Code Violation (CV): 0 0
FEC: 34380 0
ATM data path PM: Near end Far end
Bearer 0:
HEC violation count (HEC): 0 N/A
G.997.1 Statistics (last 24 hours):
Failures:
Line failures Near end
Loss of signal (LOS): 0
Loss of frame (LOF): 0
Loss of power (LPR): 0
Performance monitoring:
Line PM: Near end
Error second (ES): 0
Channel PM: Near end Far end
Bearer 0:
Code Violation (CV): 0 0
FEC: 34380 0
ATM data path PM: Near end Far end
Bearer 0:
HEC violation count (HEC): 0 N/A
--- End code ---
Since using ISP test router (FRITZ!BOX 3490):
--- Code: --- Receive Direction Send Direction
Max. DSLAM throughput kbit/s 25000 10000
Min. DSLAM throughput kbit/s 128 128
Attainable throughput kbit/s 30400 8270
Current throughput kbit/s 25000 8084
Seamless rate adaptation off off
Latency 8 ms fast
Impulse Noise Protection (INP) 3 0
G.INP off off
Signal-to-noise ratio dB 9 6
Bitswap on on
Line attenuation dB 20 30
Profile 17a
G.Vector off off
Carrier record A43 A43
--- End code ---
No errored seconds or CRC errors.
The line attenuation is a lot higher on the Fritz!Box from (14.8 to 20db). It's from exactly the same point, not sure which is more accurate.
BT wholesale checker shows higher expected figures:
Telephone Number XXXX on Exchange SUTTON IN ASHFIELD is served by Cabinet 58Featured ProductsDownstream Line Rate(Mbps)Upstream Line Rate(Mbps)Downstream Handback Threshold(Mbps)HighLowHighLowVDSL Range A (Clean)62.543.815.31039.7VDSL Range B (Impacted)49.13013.36.922.4
Premise environmentStatusBridge TapNVRINNTEFaceplateNLast Test Date04-07-2018
My ISP order estimates my line speed is capable of 46500kbps. Sync history from ISP:
--- Code: ---Upstream Downstream Sync Rate BRAS Profile Interleave Sync Date Date
7136 19300 19940 TR101 Auto 09-Jul-2018 08:08 09-Jul-2018 08:08
6208 5013 5180 TR101 Auto 08-Jul-2018 16:55 08-Jul-2018 16:55
4472 5013 5180 TR101 Auto 07-Jul-2018 05:54 07-Jul-2018 05:54
2404 4627 4781 TR101 Auto 06-Jul-2018 17:18 06-Jul-2018 17:18
4736 29588 30568 TR101 Auto 06-Jul-2018 01:52 06-Jul-2018 01:52
2376 5099 5268 TR101 Auto 06-Jul-2018 01:50 06-Jul-2018 01:50
4864 29938 30930 TR101 Auto 27-Jun-2018 06:36 27-Jun-2018 06:36
4556 30186 31186 TR101 Auto 26-Jun-2018 19:46 26-Jun-2018 19:46
5464 34706 35856 TR101 Auto 06-May-2018 00:03 06-May-2018 00:03
5416 34757 35908 TR101 Auto 05-May-2018 22:36 05-May-2018 22:36
5540 34733 35884 TR101 Auto 05-May-2018 17:07 05-May-2018 17:07
5604 35133 36296 TR101 Auto 05-May-2018 11:50 05-May-2018 11:50
5256 38714 39996 TR101 Auto 30-Apr-2018 01:33 30-Apr-2018 01:33
--- End code ---
My concern is that it's syncing just over what my ISP will deem a problem which is 50% of expected sync speed (23250kbps in my case) and they are going to try say this is normal.
Am I expecting too much from my line? Any help appreciated.
Thanks.
burakkucat:
Welcome to the Kitz forum. :)
Looking at the data that your ISP/CP has provided it is clear that something has happened to degrade the circuit's performance. Even they should acknowledge that fact.
After viewing all the other data, I am not sure what to suggest. Perhaps you could ask your ISP/CP to consider the data that they have supplied and what they would suggest?
Ixel:
Have you tried connecting a cheap analogue phone, or alternatively your standard phones (presumably DECT/wireless), to the test socket with nothing else plugged in and doing 17070 then 2 (quiet line test)? This is useful for seeing if there's unusual noise on the phone, as unusual noise could impact your broadband service.
Have your ISP, which I'm guessing is Zen by the looks of that 'sync history' layout from your ISP, ran a line test at all? I assume they have.
With INP 3 delay 8ms on the downstream I would expect very few to no errored seconds normally, so having no errored seconds doesn't come as a surprise.
DeluxeParrot:
Yes I've done a quiet line test with a corded phone and it is silent. There was a faint buzz but I tested the phone in another known good line and it was the same, so it's just the electrical hum of the speaker being powered.
Yes the ISP is Zen.
I believe they have run a line test every time I've phoned them, it wasn't until the 3rd call that they said the DLM data they were looking at previously was 2 weeks old and so wasn't showing the capping.
They are going to call back tomorrow and I think mentioning the sync history will be the best approach as burakkucat suggested.
Thanks for the replies, this forum has a been a wealth of information. You all do a good service.
RealAleMadrid:
The DLM reset has not worked, or was not done. The stats from the Fritzbox show you are on a banded profile of 25Mbps (Max DSLAM throughput) and you are syncing at that speed. I would get back to Zen and tell them to try another DLM reset. You should then get your usual sync speed.
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