You may recall
I had some problems with my Talktalk ADSL connection: I called in a BT engineer, but they could not find any fault with the line. Eventually I discovered that the cause of the problem was Rado Frequency Interference (
RFI/REIN) from my LCD monitor, which reduced the noise margin from 18dB to 12dB.I found a work around by training my monitor to run at a lower connection speed (5.5Mbps instead of 8Mbps) that was stable with the lower noise margin.
To get rid of the RFI, I bought a high end monitor (
Samsung S27B750V), but now my connection is even more unstable for some reason. When I start my router, the noise margin is in the range of 14-18dB, and the connection speed is between 5.5-8Mbps. However, the connection does not remain stable for more than 3 minutes at a time (just enough to post this message). The attached graphs of the noise margin and connection speed look like the Manhattan skyline because the connection goes up and down in an almost regular pattern.
I have run the router while my new monitor is turned off at the mains, so I sure that the monitor is not the source of the problem. Any idea what else could be be the cause of the connection dropping?
ADSL STATISTICSRouter:
D-LINK DSL-2680Mode: ADSL2 PLUS
Type: ANNEX_A
Status: Showtime
Downstream/Upstream statistics
Rate (Kbps): 8504 kbps / 411 kbps
SNR Margin (dB): 14.4 / 19.3
Attenuation (dB): 40.0 / 21.3
Output Power (dBm): 0.0 / 11.3
Super Frames: 11500 / 11501
RS Correctable Errors: 719 / 4
RS Uncorrectable Errors: 8 / 1
HEC Errors: 260 / 0
Total Cells: 44457 / 32890
Data Cells: 13139 / 6483
Bit Errors: 0 / 0