Looking at that graph and the one from Saturday - what happened at 04:30 on Saturday? You may not know but all looked OK until that time and from then on it has gone haywire.

How often do you get quiet/stable periods such as that shown on Friday night to early Saturday AM.

No idea what happened at 4.30 on Saturday, I was sleeping

Well, this morning I've unplugged from the test socket, plugged everything back in as normal and seem to have gotten a stable connection *touches wood*. I have changed routers though as I was going to plot another 48 hours with our second router to see if there was a difference.

Current stats:

Link Information

Uptime: 0 days, 0:30:51
Modulation: G.992.5 annex A
Bandwidth (Up/Down) [kbps/kbps]: 1.274 / 9.111
Data Transferred (Sent/Received) [MB/MB]: 15,76 / 312,22
Output Power (Up/Down) [dBm]: 11,5 / 19,0
Line Attenuation (Up/Down) [dB]: 23,5 / 42,0
SN Margin (Up/Down) [dB]: 6,5 / 6,0


I really don't know what's going on here but I don't want to change anything now but the current router is only an old Wireless G and I *need* Wireless N for streaming

Leave it running and see what happens.

For Wireless N - can you put your router into a slave mode so it can just act as a WAP off teh router connected to te line?

I'm going to see if it does have slave mode, hopefully it will. It's a Netgear DGN2000 V2.

I've just powered on the Netgear and it made the SNR drop to 5.5db instead of a decently stable 6db. I've got a feeling I'm working with a dodgy power supply on the Netgear.

Just turn off DHCP and give it a fixed IP address. Connect it to the other and see what happens.

Done and working fine

SNR is stable at 5.5db now, will keep monitoring.

Get an image posted in an hour or so.


Also, even though the Netgear is connected, try to avoid using it for that hour. Then, start using the wireless side to the maximum which will start to load the power supply and see what effect that has on the line - run for an hour. Then turn off completely and keep monitoring the line.

In reply to a post by MHC:

Get an image posted in an hour or so.


Also, even though the Netgear is connected, try to avoid using it for that hour. Then, start using the wireless side to the maximum which will start to load the power supply and see what effect that has on the line - run for an hour. Then turn off completely and keep monitoring the line.

Here are the last couple of hours:

http://i.imgur.com/M6XwRFc.jpg

I was doing a lot of streaming on the network and transferring files between PC's during this time.

That suggests it is not a line related fault but electronically noisy equipment pushing out RFI. Which is what a heating pump or fridge wuld do - but you have eliminated those.

If, as you think, the PSU on your second router is noisy or failing then there will be radiated noise, which would explain your earlier comment about a 0.5dB drop and also conducted. It will be on the power rails supplying the modem, and transferred to the line when it will badly affect the SNR and will also affect processing of the incoming signal too.

Just keep monitoring.