Since my 2nd BT engineer visit a couple of weeks ago my broadband connection has been stable with an average download speed of 40 Mbps. Drop outs occured whenever I mad or received a phone call. The cause was noise on the line. Then for no apparent reason last Friday (11 Sept) it dropped out and returned 30 second later with a greatly reduced speed. Here are the Smart Hub 6a technical log stats:
Data rate:6.70 / 25.33 Mbps
Max data rate 6891 / 30282
Noise margin 6.2 / 6.3 dB
Line attenuation 38.2 dB
Signal attenuation 33.5 / 38.2 dB
The next morning (12 Sept) I did a Quiet Line Test. I could hear an extremely feint hiss and doing the test caused a disconnection! About 5 minutes later I checked the Hub Manager Technical log and again it appears that I had been re-synced back to my normal speed:
Data rate 9.99 / 43.38 Mbps
Max rate 11187 / 51860
Noise 6.3 / 6.2 dB
Line attenuation 39.7 dB
Signal attenuation 25.6 / 39.7 dB
Today (13 Sept) there has been a repeat of yesterday. The stats showed that the hub had re-synced at approx 3:50am and I now had a greatly reduced speed again:
Data rate 6.37 / 24.89 Mbps
Max data rate 6712 / 29861
Noise margin 6.4 / 6.4 dB
Line attenuation 38.0 dB
Signal attenuation 33.5 / 38.0 dB
I did a Quiet Line Test and again I could hear an extremely feint hiss and doing the test caused a disconnection! Shortly afterwards I checked the Hub Manager Technical log again it appears that I had been re-synced back to my normal speed:
Data rate 9.99 / 42.66 Mbps
Max data rate 11165 / 50464
Noise margin 6.3 / 6.1 dB
Line attenuation 39.7 dB
Signal attenuation 25.5 / 39.7 dB
So what’s going on? Why should doing a Quiet Line Test apparently cause a drop out? And why if immediately after I check the hub stats does my connection show a return to a normal download speed?
