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FTTC Dropping out

MrCranky

Member
Hi All,

I've been fortunate by having FTTP for a good 10 years now, so I'm a little out of touch when troubleshooting ADSL/VDSL issues, I'm helping a friend out with his random dropouts. So for around a year now his internet connection would drop intermittently, at first it was down to a noisy line, you picked up the handset on the line that supplies the internet and it was very crackly. Openreach came and sorted that out, a little while later it did the same thing again, and now we are back at square one. The line seems quiet but the internet connection randomly drops. Openreach have been out multiple times, they are now saying that it's electrical interference causing it, first it was faulty power supplies in the LED lighting of a workshop, those got changed. I'm skeptical as when they repaired the noisy line, the engineer said he was struggling to find good pairs to the cabinet and picked the best one. The master socket has been replaced, the modem and router has been replaced, all doing the same.

The equipment we have in place is a Draytek 2862 with 4G fail over.

I looked at the DSL stats and it says the following:

ATU-R Information





Type: VDSL2
Hardware: Annex A
Firmware: 07-07-09-05-01-07
Power Mngt Mode: DSL_G997_PMS_L0
Line State: SHOWTIME
Running Mode: 17A
Vendor ID: 00000000 00000000




ATU-C Information



Vendor ID: b5004244 434dc01c [BDCM]




Line Statistics
Downstream Upstream
Actual Rate 34475 Kbps 8935 Kbps
Attainable Rate 47175 Kbps 8935 Kbps
Path Mode Fast Fast
Interleave Depth 1 1
Actual PSD 3. 4 dB 11. 1 dB


Near End Far End
Trellis ON ON
Bitswap ON ON
ReTx 0 1
SNR Margin 9 dB 6 dB
Attenuation 23 dB 25 dB
CRC 4 3212
FECS 0 s 18996 s
ES 1 s 2936 s
SES 0 s 1 s
LOSS 0 s 0 s
UAS 245 s 23014 s
HEC Errors 0 0
RS Corrections 0 0
LOS Failure 28 10
LOF Failure 0 0
LPR Failure 0 28
NCD Failure 0 0
LCD Failure 0 0
NFEC 254 32
RFEC 8 16


What is concerning to me is the LOS and LPR failures.

Any suggestions as to what we should be looking at next? Other than keep on at BT?
 

transpriory

Casual Member
request BT engineers replace the copper wires and not use existing ones, that is install new wiring from the cabinet to the premises
 

transpriory

Casual Member
I had similar issues and the BT engineer decided to replace the copper wires took less than an hour, and resolved the problem and now get near the maximum FTTC speeds. Engineer explained the copper wires degrade over time and the solution where very old wires are in place is to replace them.
 

ManOfMeans

ULTIMATE Member
I had similar issues and the BT engineer decided to replace the copper wires took less than an hour, and resolved the problem and now get near the maximum FTTC speeds. Engineer explained the copper wires degrade over time and the solution where very old wires are in place is to replace them.
It wouldn't have been a new cable all the wat to the green cab, more likely a new drop wire, to replace the E side copper cable in its entirety is quite a large job.
 

transpriory

Casual Member
It wouldn't have been a new cable all the wat to the green cab, more likely a new drop wire, to replace the E side copper cable in its entirety is quite a large job.
Thanks for this info, what is a drop wire and where does this go from and to.
 

Green Meanie

Regular Member
Drop wire is the overhead cable from the pole to your house and can usually be changed fairly quickly if it’s found to be faulty.
If you are fed underground, things can be a little more difficult.
 
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