AFAIK the KBD suite used by the ISP's are now classed as intrusive - certainly when it comes to GEA.
It would appear that as a result of in-equivalence of available tests between BTw based and the 'LLU' based SPs, the LLU type ISPs kicked up a bit of a fuss and as a result Openreach redesigned a lot of their tests. There was a stupid situation whereby for a short while that even OR Engineers as well as BTw ISPs were unable to perform any of the old WOOSH tests until the system was overhauled.
From what we can gather the old & non intrusive WOOSH (
Wholesale
Operative
One
Shot test)?, was replaced by 2 new systems:-
~ KBD for ISPs. Under the new system all GEA line tests run by ISPs are definitely considered intrusive.
~ WHOOSH for Engineers. Openreach engineers are still able to run the non-intrusive test via their WHOOSH system (Note the additional 'H' but we have no idea what the acronym stands for)
We had a conversation
here as to why line tests run by the ISP's suddenly started being intrusive. There are however strict instructions that the ISP must perform a KBD test before they can report a fault to Openreach.