Vodafone fibre copper broadband

Hi, could someone please help. I’m a vodafone customer and my interleaved depth was 8to1 which was great, but after a few power cuts it’s jumped to 16to1 and is nowhere near as good for gaming. Does anyone know if the dlm will go back to what it was, or am I likely to have it stay how it is. Thanks.

It ought to, it should respond to periods of ‘stability’ , no reboots, low error counts.

Hi Zardaz thank you for replying. I’ve also got a skyQ box with sky mini, as well as a Sonos Beam, which can be problematic when playing online, and maybe causing noise on the line, and as I’m 3.4 km to the exchange the original interleaving was 16 1 when I was on 40 dl and 10 up. The only time it’s changed from that is when they upgraded me to 70 20. If it doesn’t go back to 8to1 after a few weeks could I get openreach to intervene, I don’t mind paying them, thx.

You cannot get Openreach to intervene, you can raise a fault with Vodafone, and they may request Openreach to look into it.

Distance from the exchange is immaterial, as the DSLAM is near the street cabinet.

Disconnect and unplug all the ancillary equipment, and run without it for a while, does this help things ?

Yes, it will normalize after some time. Obviously DLM is interpreting the power cuts as an unstable line and has been triggered to lower speeds increase SNR/latency in order for the service to be smooth.

Even if Openreach were to intervene and reset the line, the problem is that you may get power cuts again causing this to trigger the issue. You'd have to address the power cut issues. Maybe try and install some power bank to your router to prevent this from happening.

I could try that, i’ll Let you know the outcome. I have a live bqm running would you mind taking a look and letting me know if something doesn’t look right. I have a lot of small red dots at the top but on the whole I’d say the graph looks ok.

Hi Blazing, the power cuts are very rare, if at all, but it rained for 3days and there was constant lightening, a second one was the electricity meter going on to emergency and losing power temporarily, it’s just really bad luck that the 2 cuts were in quick succession which has changed the interleaved depth to 16 1. I have a bqm running, would you mind taking a look and letting me know if something looks off.

I thought the DLM was meant to take into account other connections on the same cab when it came to say lightning. So if all lines on that cab are having errors/noise due to lightning, the DLM wouldnt kick in as it knew it was a more global issue than just your specific line.

I know we have had lightning strikes, errors on line etc and the DLM didnt do anything

In reply to a post by bobble_bob:

I thought the DLM was meant to take into account other connections on the same cab when it came to say lightning.

This is interesting, how would it differentiate between a D side cable breaking down and lighting because surely both induce errors.

In reply to a post by PCJM40:

This is interesting, how would it differentiate between a D side cable breaking down and lighting because surely both induce errors.

same spike at the same time across 30+ lines in different bundles perhaps. Would require more local wiring knowledge to be programmed into DSLAM than may be cost effective though.

This is where i read it

1. Check for Wide Area Events

Each day, the DLM Management Device receives sets of data from the DSLAM's element manager. First it will analyse the event data from all lines to check for events such as thunderstorms which may have caused multiple lines to resync and/or generate lots of errors.

If a pre-determined percentage of lines experience retrains and errors in the the same time frame then any events occurring in that time frame will be classed as a Wide Area Event.

Documentation would suggest that the percentage values for wide area events are: >20% of users with uptime experienced a resync OR >50% of users with uptime experiencing errors && >10% of users with uptime experienced a resync.

So attempting to put it in simple terms, if data in the binary file in any of the 15 min bins at the same time frame meets any one of the following two criteria:

> 20% of bins are [1,1,1] OR [1,1,0]
> 50% of bins are [1,0,1] AND >10% of bins are [1,1,1]||[1,1,0]

then a wide area event is declared for that period. Data from any bin within the corresponding time frame is discarded and not used for the DLM calculation.

https://kitz.co.uk/adsl/DLM.htm

OK thanks for this info, so it doesn't specifically detect lighting, just looking for a mass of line re-syncs and/or a mass of line errors in a 15 minute window that meet pre-determined thresholds.

Edited by PCJM40 (Mon 02-Oct-23 22:40:33)

Yea, although lightning and powercuts are the most likely culprits

Even if it’s always been on 16to1 when I had lower speeds 40 10. Since they upped them to 70 20, the only time I’ve ever seen it at 8to1 was the implementation of the service, and it’s just really bad luck that the power went twice in quick succession.

In reply to a post by JAMSROO777:

Even if it’s always been on 16to1 when I had lower speeds 40 10. Since they upped them to 70 20, the only time I’ve ever seen it at 8to1 was the implementation of the service

The line may already have been on the tipping point, If the line is clean enough it will revert, if not it won't

Thanks, I’ve noticed the sky Q box is causing packet loss, would this have any bearing on the stability of the line?