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REIN ?

supernova1
Grafter
Posts: 106
Registered: 17-11-2013

REIN ?

Hi,
Over the past few weeks I've noticed that the noise margin temporarily rises between 1 and 2dB.
This takes my max speed from about 76 to 80mbps.
The time period can be between 10 mins and an hour, so it appears that a 'noisy thing' is going quite for a while.
Any ideas on how to track this one down?
ATB
SN
5 REPLIES
Community Veteran
Posts: 19,101
Thanks: 443
Fixes: 21
Registered: 31-08-2007

Re: REIN ?

Can you look at the individual bands in more detail? If you can get some idea of the frequency bands affected you might be able to use a radio receiver.
Does it occur at the same time of day or within certain time slots? Try keeping a log.
Community Veteran
Posts: 5,109
Thanks: 465
Fixes: 17
Registered: 10-06-2010

Re: REIN ?

Maybe the noise margin temporarily rising is someone nearby switching off their VDSL2 modem for a little while, temporarily reducing the crosstalk.
Community Veteran
Posts: 19,101
Thanks: 443
Fixes: 21
Registered: 31-08-2007

Re: REIN ?

That thought crossed my mind, but it's a whole dB, so I'd have thought they'd need to have badly balanced line for that much cross-talk, so I'd consider that after checking other factors, and see if there is any pattern. I do note that the "off" time is nearly an hour - the suggested time for turning off a Fibre modem to hopefully avoid DLM issues when a resync is wanted - could be coincidence!
supernova1
Grafter
Posts: 106
Registered: 17-11-2013

Re: REIN ?

Thanks all,
I'll keep  an eye on it and recod as much as I can.
It might take a considerable time to gather sufficient data to even attempt of get a conclusion.
ATB
SN
Community Veteran
Posts: 19,101
Thanks: 443
Fixes: 21
Registered: 31-08-2007

Re: REIN ?

As would be expected  Undecided