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[KIAB]

Had my line moved end of last year, was getting 50Mb at first, engineer said it could rise .
It lasted about two weeks until we had rain, then connection would drop, maybe for minutes or hours,Link status was showing 'DISCONNECTED'. had 25 disconections in 72 hours.
It then would take several days for the speed to recover, have had engineers out, they have found various faults, last engineer said line was uncapped, but there was a problem due to me only getting anything up to 27Mb, usually less.
The continuning problem I'm having was probably due the aluminum cable, I'm roughly 600mtrs from the cabinet.
Included my stats prehaps someone can see a problem.

Could DSL Checker be wrong, I'm barley 60' from my neighbour, we share same junction box on the pole?

Neighbour:

FTTC Range A(Clean) Download: High 80 - Low 72 . Upload High 20 - Low 20

FTTC Range B(Impacted): High 80 - Low 61.9. Upload High 20 - Low 12.2

Mine:

FTTC Range A(Clean) Download: High 59.6 - Low 39.3 . Upload High 16.1 - Low 10

FTTC Range B(Impacted): Download: High 50.8 - Low 28.2. Upload High 15.7 - Low 7.



Link Status    Showtime
Firmware Version    1412f0
VDSL2 Profile    17a
Basic Status   Upstream   Downstream   Unit
Actual Data Rate    5000    27387    Kb/s
SNR    72    75    0.1dB
Advance Status    Upstream   Downstream   Unit
Actual delay    8    16    ms
Actual INP    40    80    0.1 symbols
15M CV    0    0    counter
1Day CV    0    170    counter
15M FEC    0   0    counter
1Day FEC    41552    25700    counter
Total FEC    68942    41574    counter
Previous Data Rate    4999    24989    Kbps
Attainable Rate    7478    35274    Kbps
Electrical Length    138    138    0.1 dB
SNR Margin    72    N/A    (US0,--) 0.1 dB
SNR Margin    72    76    (US1,DS1) 0.1 dB
SNR Margin    72    75    (US2,DS2) 0.1 dB
SNR Margin    N/A    72    (US3,DS3) 0.1 dB
SNR Margin    N/A    N/A    (US4,DS4) 0.1 dB

[burakkucat]

Could DSL Checker be wrong, I'm barley 60' from my neighbour, we share same junction box on the pole?

Neighbour:

FTTC Range A(Clean) Download: High 80 - Low 72 . Upload High 20 - Low 20

FTTC Range B(Impacted): High 80 - Low 61.9. Upload High 20 - Low 12.2

Mine:

FTTC Range A(Clean) Download: High 59.6 - Low 39.3 . Upload High 16.1 - Low 10

FTTC Range B(Impacted): Download: High 50.8 - Low 28.2. Upload High 15.7 - Low 7.

The estimates are calculated to the DP (distribution point), so there does appear to be something wrong.

[WWWombat]

The neighbour's estimate appears to be more appropriate to 200-300m of copper, while yours appears to be perhaps 700-800m of copper. They are very different estimates, when they should be similar!

For comparison, Here's an estimate for a line I know to be approx 650m long:

Code: [Select]

FTTC Range A (Clean) 68.6 50.3 20 14.1 -- Available
FTTC Range B (Impacted) 59.7 33 19.9 8.9 -- Available

And here's a comparison for a line I know to be 350-400m long:

Code: [Select]

FTTC Range A (Clean) 80 60.8 20 20 -- Available
FTTC Range B (Impacted) 74.8 48.4 20 12.2 -- Available

Looking at your stats, I'd say that you are indeed having some problems - with DLM having intervened on both upstream and downstream, and both interventions are pretty full-on. It looks to be a worse problem than the average line suffering from crosstalk.

[KIAB]

Looking at your stats, I'd say that you are indeed having some problems - with DLM having intervened on both upstream and downstream, and both interventions are pretty full-on. It looks to be a worse problem than the average line suffering from crosstalk.

Could this crosstalk be made worse by poor aluminum cable?

[WWWombat]

As far as I understand it, aluminium is "poor" for two reasons:

a) It has higher attenuation per length (especially for higher frequencies), so signals degrade more over similar distances of aluminium.
b) Joints with aluminium tend to corrode more than copper, leading to stability problems.

Whereas crosstalk happens when two wire pairs run parallel for a significant distance, and the induced current is not negated by the twists in the pairs.

I don't see how the main 2 problems can cause extra problems with crosstalk. However, I'm not an RF engineer, or an analogue one for that matter.

[renluop]

Warning OT

Isn't ADSL Copper attenuation ~13.61 dB/km? Is there a reckoned rare for ali?