Can't Downgrade SpeedTouch 546v6 - Please Help!

I have got a SpeedTouch 546v6 that I would like to downgrade to be able to use DMT's full functionality with it. I am looking to downgrade it to firmware 6.1.0.5. I have managed to downgrade it to firmware 6.1.9.6 but it won't go any lower than that, I can upgrade it but not downgrade it any further than 6.1.9.6.

When I use the downgrade wizard it get's to about 30 percent and then it says "router rebooted in the wrong mode" and then I have to upgrade the router to get it out of kernel mode. This was with a static IP.

I got the firmware from here:
http://mirror.opensourcehub.com/pub/speedtouch/route...

What can I do?

Quite normal for you not to be able to down grade beyond a certain point. Many reason but unlikely to be able to get round it.

I found these instructions on PCAdvisor forum a long time ago and it worked for me when I had the same problem with a 585.
I've no idea if it works for the 546 but might be worth trying.


"To Downgrade SpeedTouch 585 v.6 Firmware


Connect the unit to the computer via ‘Ethernet port 1’

Have the ‘SpeedTouch Upgrade Wizard’ interface open; either from SpeedTouch CD or file.

Begin with the unit powered ‘Off’ via switch at the back

Using pin/pencil push the ‘Reset’ button and hold it in

Keeping the ‘Reset’ button pushed in, power ‘On’ the unit.

Do Not Release the ‘Reset’ button for 15 seconds.

The ‘Power’ light initially goes ‘amber’ and then both ‘Power’ and ‘Ethernet’ lights should flash between ‘red’ and ‘green’

Run the ‘SpeedTouch Upgrade Wizard’.

You only have around a minute to start the wizard before the SpeedTouch reverts to the ‘normal’ bootup and the downgrade will fail if this happens."