only way from what i saw on uk forums,to have the line in fast is (to disable g.inp in my case) then inp 0 and delay 0,that way forward
errors will not be corrected.i didn't see people with g.inp enabled and inp 0 delay 0 or some kind of fast lane with g.inp.
I'll repeat: "INP" is not the same as "G.INP".
In the UK, we have 3 basic modes of operation:
1) Fastpath
INP=0, delay=0.
Most susceptible to errors
In mode (1), G.INP is not active.
2) Interleaving and FEC
INP=3 or 4, delay=8ms, 12ms or 16ms
With these settings, interleaving depth is around 1,000 and latency increases by between 8ms and perhaps 20ms.
In mode (2), G.INP is not active.
3) Retransmission - aka G.INP
INP=40-50, delay=0.
With these settings, retransmission is the main protection method, but
small amounts of interleaving exist. The interleaving depth is less than 100, and the latency doesn't increase in any appreciable manner.
In mode (3), G.INP is active. Retransmission is used when errors occur.
In the UK, mode (3) - with G.INP enabled - is generally thought to be the best mode to use - it gives the lowest error count, with the lowest impact to latency for gamers.
It looks like your line is currently in mode (2), or the Italian equivalent. You do not need to try to disable "G.INP" because it is not turned on for your line.