I don't know if my cab is exactly the same but they left it on, Openreach decided to turn it off to not get calls from people with incapable modems. But 2-3 years later (is it, lazy to check) there wouldn't be as many incapable modems. They don't care.
Also, upstream G.INP on ECI was
never enabled for anyone on FTTC (at least, it has remained off due to incapable hardware). This proves ECI cabs have no hope except swapping hardware for that, and this makes me doubt firmwares on the cab itself will fix downstream G.INP for "all modems" [the ones that otherwise work perfectly on Huawei cabs], including all the modems still running with outdated firmware.
Of course they only care about themselves, people with power are even less forced to be good.
Stats recorded 26 Jun 2018 12:34:47
DSLAM type / SW version: IFTN:0xb206 (178.6) / v0xb206
Modem/router firmware: AnnexA version - A2pv6F039x1.d26a
DSL mode: VDSL2 Profile 17a
Status: Showtime
Uptime: 4 days 5 hours 48 min 53 sec
Resyncs: 0 (since 26 Jun 2018 12:34:43)
Downstream Upstream
Line attenuation (dB): 10.8 0.0
Signal attenuation (dB): Not monitored
Connection speed (kbps): 44880 3455
SNR margin (dB): 25.3 19.3
Power (dBm): -14.8 -15.0
Interleave depth: 1 55
INP: 44.00 2.00
G.INP: Enabled Not enabled
Vectoring status: 5 (VECT_UNCONFIGURED)
RSCorr/RS (%): 0.0001 0.1095
RSUnCorr/RS (%): 0.0000 0.0000
ES/hour: 0 0
They claim the last firmware they tested worked except on a very few routers which still had problems.
The same excuse like before. The key word is they don't care because people are "forced" to use their cabs anyway.
I imagine "all of" the other ECI cabs in Israel have G.INP enabled. I'm only using VDSL since August 2017 though, but this thread shows it was enabled in 2017:
https://translate.google.com/translate?u=https%3A%2F%2Fwww.hometheater.co.il%2Fvt271090.html