Broadband Drops Regularly

[Carbon_Dioxide]

Hello,

We moved to Sky Broadband a few months back, and up until the last 24 hours the service has been very reliable.   However, in the last 24 hours, we've experienced a constant issue with our broadband dropping.  We also have Sky Stream, so watching television has become an incredibly frustrating experience, with one hour programmes sometimes dropping at least 4 four times before the end of an episode.

We've changed nothing in terms of set up in the last few days, and the drop only occurs for a matter of a couple of minutes before it's back up and running.  I've attached a couple of images based on similar posts so hopefully it can assist on a solution.

Any help, hints or suggestions to resolve would be greatly appreciated!

[Highlinder]

@Carbon_Dioxide  Did you at any time when these drops are happening run the broadband test to see if it finds an external fault?

[Carbon_Dioxide]

@Highlinder I ran the service checker yesterday and today and on both occasions the checker confirmed everything looks good. 

[mae-3]

@Carbon_Dioxide 

The broadband line is below hand back to Openreach, noise on the broadband line and likely at the cabinet end of the connection. Handback is 44Mbps on the Openreach sheet.

[Carbon_Dioxide]

@mae-3 Thanks for the response, I'm not particularly technical minded so could you explain what that means in Lehman terms?

As an update, we've ran the service checker this morning and now been told there's a problem with the connection to the hub and needs an engineer to visit to resolve. So, hopefully the open reach team can resolve!

[mae-3]

@Carbon_Dioxide 

The signal has deteriorated at the number of wavelengths shorter than the full length of the broadband line. by a long way .

This is because the noise margin would go up at longer lengths and has gone down below 3dB and speed dropped owing to good signal but deterioration in signal at its wavelength number less than full line length by a long way. Longer length line faults show a deterioration in the lower frequencies and increased noise margins.

This impacts speed (lower frequency signals usually, dry joint pass higher frequency) but not signal quality based on attenuation, eg: speed drops because a joint on the line close to the transmitter cannot maintain quality at the lower frequency. Eg: the lower frequency cannot travel along the broadband line, indicating a shorter distance to the fault, eg: and the loading impedance is lower in value (high frequencies pass but lower frequencies do not). Slightly open circuit fault with higher capacitance.

The base of frequency is ratio-dependent, the higher the ratio the higher the noise margin and drop in signal, the noise margin going up shows that the signal needs amplification generating noise but is still there and speed then drops due to amplifying the noise further lengths on the broadband line have this characteristic, that has not happened; high noise margin means more amplification for a good signal but at a lower signal level closer to the endpoint (premises).

[mae-3]

The second joint point should be checked, eg: the fault is not at the cabinet it is slightly further out, say about 5 metres in length I estimate. from the cabinet at the PCP.

[mae-3]

Recommend router stats show all their noise margins for the bands (D1, D2 and D3), and adjust the lower D1 band to show a higher noise margin in this case at a higher level indicating lower frequency deterioration for diagnostics for AI algorithm for fault finding in the case above.