And so it started...
It is particularly annoying to have a failed internet service for the following reasons:
Service interruptions from 12 June 2010 onwards (if only the service availability allows me to update the site)
Luxembourg Online and the cable service Eltrona reacted quickly and sent a technician for the morning of 15 June 2010.
Measurements and installation of an amplifier took 2 hours of the technician's working - and the client's free time. As a result, measurements showed acceptable signal levels: upstream 46 dBmV and downstream -3 dBmV and my connection worked. However, I rarely had problems in the morning...
The next day it started again: a service failure while paying my holiday trip. The upstream connection was lost. Downstream signal was -12.6 dBmV.
Why is the signal level changing so much? Is it the poor cabling I have inhouse (which is in a fairly constant temperature) or Eltrona's infallible cable outside? Or is it because the Motorola SGB900E is scanning different frequencies and at a busier time, the frequency found is more damped out than the one found during the off-peak period? Not as far as I can see: These two shapshots show that the signal level changes very quickly - and that the frequency for both channels is the same.
Reporting continues after the amplifier installation
In the morning, everything was perfect. However, at 2 pm, the signal levels were much worse, even if there were no time-outs (yet): Downstream signal was damped by 9.8 dBmV and the modem was screaming at 55 dBmV upstream.
In the morning, it seems that I had the whole bandwidth at my disposal a speed test showed >7 megabits downstream speed, but in the afternoon, I had to share the capacity with another user.
Does this mean that my connection works properly only if I am alone on the line? Not only the speed is eaten by other users, but also the connection becomes instable.
Despite some moments when the downstream signal level was down to -12.9 dBmV, SNR close to 30 dB and the modem was pushing upstream at 55 dBmV, there have been no service breaks during the week-end. Still, the fluctuating signal levels are a concern...
During Tuesday 22 June 2010 from 18.30 to 19.00 another service breakdown appeared. Could this be caused by the Luxembourg Online/Eltrona staff celebrating the Eve of the National Day - and ignoring to send some smoke signals, or another essential part of the hidden communication network between the client and the Internet?
The party at Luxembourg Online/Eltrona seems ho have resumed: Several interruptions of the service have taken place during the National Day (see the link below). At 20.20, the signal levels are poor and the connection was lost. Happily I was not caught in the middle of a phone conversation this time. The simple conclusion is: This Luxembourg Online cable modem connection is far too often offline and it is very unreliable! The service breaks take place during the hours when it is mostly used (18-21 in the evening) and the helpdesk is also "offline".
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