Sat 10-Dec-16 19:27:43
I thought it was so the phone was usable. The racket DSL puts on the line would make it impossible to use.
(My emphasis - eckiedoo)
Have you, Robertos, or anyone else actually tested that statement AND published the results?
As I could not recollect if I had specifically checked my phone line, to see if it behaved as you described, I tested as described in my earlier post.
As my physical test results clearly contradicted your statement, I felt it would be useful to all, to give you (and others) the opportunity to review my results, try to duplicate or refute them rationally etc.
Hence my presenting them in detail, as is normal for such situations.
Since then, I found my simple Line Doubler (ie no filter) and have generally repeated the earlier tests.
The results were the same, although the old corded Test Phone was clearly on-line simultaneously with the the VDSL signals.
I also tested the Test Phone by having it as the only item directly connected in to the old non-filtered NTE.
Under all the test conditions, the QLT and Time Clock calls showed absolutely no signs of audible interference from the VDSL.
This accords with the fact that the xDSL signals are all generated at frequencies well above normal human hearing range.
To increase the possibilities of any interference occurring, I had two computers using the VDSL simultaneously -
a) Tower PC via Ethernet cable directly in to the Bright Box 2 router/modem
b) Laptop (visible from the cupboard as I tested), connected by the main 2.4 GHz WiFi.
I had three sites running simultaneously and separately on both -
flightradar24 - at global level, updating about 10,000 aircraft
Meteociel displaying North-West Europe weather
Danish Energy Generation
Additionally, I had TeamViewer running from Laptop to Tower, as I don't have those three sites included on the Laptop, so TV was a means of accessing and copying over the URLs.
Just after I had connected the old Corded Phone directly to the old NTE, nothing else connected - there was an incoming call, which again behaved exactly as normal and as I would have expected.
The old Corded Test phone was fully usable in all of the described circumstances.
No untoward noises etc of any sort, contrary to your statement quoted above.