Will try some of the pre-release versions as this is on 5.8.0.0, just want to log/report this before I forget, but it seems to detect/report that G.INP is enabled to MDWS (User iMiMx / iMiMx2) but it isn't (ECI cab). Telnet data below from DSLStats for 1 of the modems/lines below:
xdsl info ginp=yes
G.INP Info:
Status: 0
Framing Info: Near end Far end
Q: 0 0
V: 0 0
RxQueue: 0 0
TxQueue: 0 0
G.INP Framing: 0 0
G.INP lookback: 0 0
RRC bits: 0 0
Retransmit counters: Near end Far end
rtx_tx: 0 0
rtx_c: 0 0
rtx_uc: 0 0
G.INP Counters: Near end Far end
LEFTRS: 0 0
minEFTR: 0 0
errFreeBits: 0 0
{Administrator}=>
Using old Zen TG589V3's in bridge mode, gives me the best sync (eventually), swapped from 8800NL's earlier today.