DMT and HomeHub

I have been successfully using DMT version 7.31 on my BTHomeHub for several months and using it achieved a constant download sync rate in the high 5000/low 6000 with a SNR varying between 7 and 10 db. Now my hub has upgraded the firmware to 6.2.2.6 and DMT reports that this firmware is not supported. My sync rate has now dropped to 4800 with a SNR of 19/20 db even after forcing hub to re-synch. Is there another version of DMT that supports this firmware or is there anything else I can try to restore my previous synch rate?

Unless you can get the older firmware back on it, there's nothing you can do.

Other than changing the firmware you'd have to try and maintain the sync for 14 days for the target SNR to come down in 3db stages. Obviously that could take a while even if you could maintain the sync.