Broadband phone usage

[#1]

I see in my usage stats a tiny 1% is shown as Broadband phone calls, but as I don't Skype etc, could Plus Net be recording something else under that category?
My phone is BT as only they offer the BT Call Sign service which I need for my fax to distinguish incoming calls from faxes.

[#2]

Hi Gel,
It is possible that our traffic management routers could be identifying some other type of traffic incorrectly as VOIP (broadband phone). As the amount indicated is so minimal I would not be concerned by this but would urge you to raise this with our support centre if you do see this increase at all.

[#3]

Hi Gel,
Interestingly, I also queried my VMBU last week as I noticed that 11% of my usage was attributed to broadband phone calls. The answer I received was:-
"Thank you for your query. Our VMBU system is not completely accurate as we cannot actually see what you are doing on the internet. For this reason we have to make an educated guess going on the type of traffic/ ports used etc." (CSC Analyst)
So, Plusnet do not have a crystal ball!!
Hope this helps.
Kind regards,
Brian

[#4]

I'd be concerned if mine got to 11%
I do use a VPN occasionally; wonder if that could be a contributor???