I have been using ADTRANS for couple years, having an issue with couple 908 Gen 1.
I try to upload a firmware in this case T900G2A-R10-9-3-E.biz that I got from another unit with the same model and I can upload to flash
When I make it a boot image I get IMAGE CORRUPTED
ootstrap#boot system flash T900G2A-R10-9-3-E.biz
%Bad file signature.
'NONVOL:/T900G2A-R10-9-3-E.biz' is not a valid image.
Primary image error. Primary boot configuration not updated!!!
bootstrap#$m flash T900G2A-R10-9-3-E.biz T900G2A-R10-9-3-E.biz -verify
% Unrecognized command
bootstrap#$lash T900G2A-R10-9-3-E.biz T900G2A-R10-9-3-E.biz
G2 = gen2.
Try any of these