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[NEXUS2345]

My grandparent's ADSL2+ line is for some reason interleaved and I am not sure of the reason why. The username for the line is AGF123 on MDWS, and there will only be about 1-2 hours of stats as I don't have anything that can do constant logging. If you want, compare it to my line stats on the username NEXUS2345, as those are stable with a very high sync.

It could be due to the use of an Asus modem router, but I have now replaced that with an HG612 and TP-Link router. They were on TalkTalk as well, but I have now moved them to Uno to gain some more fine grained control.

Any help would be appreciated.

Thanks,
NEXUS2345.

[les-70]

 It is hard to say once interleaving has occurred. If it is a TTB line with uno you should have control of the line profile yourself by logging in and be able to set interleaving off and a srrm of 6.  Either way uno should be able to set it to fast path and a  normal target snrm of 6.  You will then be able to see what the error rates are and whether interleaving or a higher snrm is needed is actually needed for stability.

[aesmith]

The thing that strikes me is the 12dB noise margin, do you think the line might have suffered from a high error rate? Or maybe does so overnight or something.  If you can't leave DSL Stats logging then maybe have a look on the router at errored seconds accumulated over various times, for example overnight.

[NEXUS2345]

The line suffered a lightning strike about a year ago now. It struck the distribution box on the telephone pole and fried the last modem which we subsequently replaced with the same model. BT did not however replace the drop wires, leading to me being suspicious of it.

I am requesting that Uno perform a line test once BTOR give them access.

[NEXUS2345]

Ok, I have had Uno perform the line test, and they confirmed my suspicion that there is a fault. However it appears to be an internal wiring fault, which I would tend to agree with as the master socket was installed in most likely the 50s/60s.

Here are the test results:

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Rectified Loop

A Rectified Loop has been detected. Loops are most likely to be caused by wiring or equipment at the customer property. Please ask the EU to remove all CPE and retest.


Fault Dispatch
Fault Dispatch Location INDETERMINATE
Fault Dispatch Reason RECTIFIED LOOP

Fault 1 rectified short

Test Result Details
Property Value Result Reason
Narrow band
AC voltage
A-B AC Voltage 0.0 volts
A-Earth AC voltage 0.0 volts
B-Earth AC voltage 0.0 volts
DC Voltage
A-B DC voltage 0.1 volts
A-Earth DC voltage -0.2 volts
B-Earth DC voltage 0.0 volts
DC Battery voltage
A-Battery DC voltage -0.1 volts
B-Battery DC voltage 0.0 volts
2 Ways Capacitance
A-B capacitance 234.2 nF
A-Earth capacitance 192.75 nF
B-Earth capacitance 192.25 nF
2 Ways Capacitance Supplementary
A-B Earth capacitance 249.58 nF
3 Ways Capacitance
Parameter AB Capacitance 20.0 nF/km
Parameter Earth Capacitance 58.0 nF/km
A-B capacitance 171.89 nF
A-Earth capacitance 120.6 nF
B-Earth capacitance 117.35 nF
Mutual Capacitance 101.06 nF
Unbalance Capacitance 3.25 nF
Estimated line length 2079 m
Unbalance capacitance ratio 2.73 %
Unbalance capacitance per km 1.56 nF/km
Mutual capacitance per km 48.6 nF/km
3 Ways Resistance rectified short
Unbalance resistance ratio 0.0 %
R A-B 47.29 KOhms
R A-Earth 63.5 MOhms
R B-Earth 63.5 MOhms
R B-A 488.50 KOhms
Signature Detection
Terminal Capacitance 2.58 uF from discharge
R A-B DC 47.29 KOhms
R B-A DC 488.50 KOhms
R A-B AC 329.17 KOhms
Complex termination impedance no
Parallel Signature #1
CPE Detected CPE detected
Line Termination (MasterJack) Line Termination (MasterJack)
Longitudinal Balance
Longitudinal Balance 63.3 dB
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