Ok, so I have tried turning off the plasma TV and the sky box.

It doesn't seem to make any difference. The line shows a few errors, and then suddenly around 1500 errors come all at once. any ideas what could cause this to happen? crosstalk maybe?

Since Link time = 43 min 45 sec
FEC: 5355 1121

Since Link time = 47 min 45 sec
FEC: 5365 1122

Since Link time = 48 min 15 sec
FEC: 5391 1122

Since Link time = 48 min 45 sec
FEC: 6837 1677

Since Link time = 52 min 45 sec
FEC: 8308 2232

Since Link time = 58 min 15 sec
FEC: 8314 2232

Edited by deleted (Fri 14-Jun-13 23:46:58)

Central heating/boiler/pump turning on and off?

In reply to a post by RobertoS:

Central heating/boiler/pump turning on and off?

If only.. it hasn't come on for the last hour or two.

Fridge/Freezer cuts in and out, so could be that, worth turning off for a while - don't forget to turn it back on though, or you will be in trouble

could this pattern of errors be crosstalk from other lines? could it be some local interference that happens every x minutes or so... in which case, will DLM putting interleaving on the line and reducing speed really help in this scenario? there doesn't actually seem to be a specific amount of minute when the errors are coming up, just that there can be 10-15 minutes sometimes when there are no errors at all.

I wish there was a way to specifically find out what the cause of these errors are. Neighbours alarm? etc

Since Link time = 1 hours 7 min 15 sec
FEC: 8321 2232

Since Link time = 1 hours 11 min 45 sec
FEC: 8325 2232

Since Link time = 1 hours 13 min 45 sec
FEC: 8340 2232

Since Link time = 1 hours 14 min 15 sec
FEC: 9793 2788

Since Link time = 1 hours 19 min 15 sec
FEC: 9795 2788

Since Link time = 1 hours 20 min 15 sec
FEC: 11254 3344

Since Link time = 1 hours 30 min 45 sec
FEC: 11254 3344

Since Link time = 1 hours 35 min 47 sec
FEC: 11270 3347

Since Link time = 1 hours 37 min 47 sec
FEC: 12115 3347

Since Link time = 1 hours 39 min 15 sec
FEC: 13555 3347

Since Link time = 1 hours 41 min 47 sec
FEC: 15118 3349

Since Link time = 1 hours 43 min 47 sec
FEC: 15322 3349

Edited by deleted (Sat 15-Jun-13 00:36:22)

In reply to a post by R0NSKI:

Fridge/Freezer cuts in and out, so could be that, worth turning off for a while - don't forget to turn it back on though, or you will be in trouble

thanks. will give it a try.

you're right, I would be in trouble. I had to turn the power off the other day whilst I was removing some light fittings, and half way through the job I received a little reminder that the fridge was still off...

Edited by deleted (Sat 15-Jun-13 00:38:20)

I think this could be one of those problems where it is just really unlikely I will ever get to the bottom of it.

I'm guessing there is no electrical device in existence which can easily detect what kind of interference this is, and where it is coming from?

Edited by deleted (Sat 15-Jun-13 00:43:58)

In reply to a post by adp1:

I had to turn the power off the other day whilst I was removing some light fittings, and half way through the job I received a little reminder that the fridge was still off.

The lighting circuits should be on a separate fuse from the ring main, cooker or anything else, in fact two - one for upstairs and one for downstairs, with a bit of confusion about landings that are switched at each end, or with a modern unit separate circuit breakers. You just need to **remove/switch off the right one. Always check they have stopped working before carrying on!

** Best practice, H & S, is to turn the power off before removing or re-fitting fuses, but you can turn it back on in between.

Edited by RobertoS (Sat 15-Jun-13 12:28:15)

In reply to a post by adp1:

I think this could be one of those problems where it is just really unlikely I will ever get to the bottom of it.

I'm guessing there is no electrical device in existence which can easily detect what kind of interference this is, and where it is coming from?

You could try the method I used to trace some ADSL2+ interference about a year ago and that is to turn on a MW radio and tune to a quiet spot at around 800Khz. If there is a dodgy inverter power supply or other similar source around (such as the plasma TV that's been suggested), you'll be able to hear it when it starts up as a loud buzz. In my case it was a faulty inverter supply on a neighbors PC LCD screen - whenever it was on MW became unusable and my ADSL usually disconnected.

Although I found the house another way (it stopped for 2 weeks and they had been on holiday!) if I walked up the road with a portable MW radio (Roberts have a small cheap one Sports 925) it just got louder and louder until I was near their house!

There are two audio MP3 recordings I made at same volume levels (tuning around during them):

QUIET

INTERFERENCE

Those recordings were made upstairs in my house - the actual faulty PSU was about 150 feet away.

Just a thought. Yours sounds a bit more like it's in pulses, plus you are on fibre and I'm ADSL (for a few months more anyway). But you might hear something and be able to walk around and get an idea where it is.

Edited by tbailey2 (Sat 15-Jun-13 13:07:30)

I had a lot of problems recently with a very dirty power supply and there are multiple faults in the area on the HT cables.

I got a APC UPS with true sine wave output stuck my PC, router etc all onto it and my speed has jumped back to 80/20 only a few FEC a day and rock solid noise margin that has been up for 28 days now.

And fastpath has been returned to me as well by the DLM.

All I can assume that the power supply to my house is not very good for sensitive electronics, although at £200 it is a bit of an expensive experiment for FTTC to see if it sorts it out.