See kitz site here http://www.kitz.co.uk/adsl/ginp-retransmission.htm
OK, this was 2 years ago but has certainly never been contradicted or updated on kitz site as far as I can see.
Has BT changed it's DLM policy on G.Inp application since 2015 ?
Surely every VDSL2 line would benefit from G.Inp action especially with respect to DS ES rate, anyone who has access to MDWS have a look at the historic data of anyone who has had G.Inp applied, the before and after effect on DS ES rate is remarkable, better than interleaving with not as many of the associated overheads such as increase in latency.
Yes, I agree on the number of MDWS active users on Huawei cab's (10) which have recently lost G.Inp, examine their current stat's., most are now on quite severe depth DS interleaving, why is this being applied when G.Inp was doing a better job with less overheads ?