Evening everyone - I'm new here and new to telecomms stuff like routers etc so please bear with me.
I'm a licensed Ham Radio operator and I'm finding that every time I transmit on certain frequency bands I kill the link to my router. I know that my transmissions are clean. This is with a FTTC "fast fiber" BT/Plusnet service that is pretty quick (60Mbps) with overhead copper to the house so I am ASSUMING that it's VDSL.
At the moment (see rsgb.org) there are a lot of problems with interference to/from Ham Radio from VDSL. Ofcom and BT deny that there is a problem, but then Ofcom lied about their own report into interference from powerline ethernet adapters a few years ago until they were forced to unbury their report so there's nothing new there.
The problem is that VDSL uses the amateur bands at 1.8, 3.5, 7, 10 and 14MHz. For some reason BT cannot understand the laws of physics (ya canne change the laws of physics, Cap'n ...etc) which are pretty clear: put a radio frequency signal into an unshielded and unbalanced wire and becomes an a-n-t-e-n-n-a.
VDSL standards allow for - and in fact specify - that amateur bands should be notched out of VDSL, but BT don't do it because it decreases line speed and Ofcom are simply shirking their jobs.
So....
I see that I can buy a Huawei Openreach-branded modem (HG612 3B) and put original Huawei firmware on it - as people have kindly shared on this site. I also see that there are Huawei commands to apply notching:
http://support.huawei.com/hedex/pages/EDOC100015172931189794/01/EDOC100015172931189794/01/resources/cmd/xdsl_rfi-global-config.html I understand (though correct me if I'm wrong) that if the BT cabinet sees that the device in the home is not responding to a particular frequency then it will avoid it. I believe that someone out there has made a quarter length open stub of transmission line at the correct frequency (which acts as a band-stop filter) and has successfully notched out certain frequencies.
So here's the question and the plaintive cry for help:
Does anyone know how to apply RFI notching on this modem?
Will it work? Can you do it, or are these commands for a different device?
Where do I change config files or type in commands?
Any help would be gratefully received!
Thanks
Dave