Yeah, there is not really a good way of doing that easy in the ECS. Even in 5.X software, it takes multiple steps. Very easy in the 7100 but more steps in the ECS but accomplishable.
I have the keys and the code to upgrade this customer to 5.X but I am leary of doing this due to the fact that they are running Cisco handsets which was a nightmare getting those working correctly in the first place, it required upgrading the firmware to a newer Skinny Protocol firmware just so the firmware would be high enough to handle installing the SIP firmware. Then having to build out 75 phones worth of config files manually. So until they are ready to replace the Cisco phones I have put a freeze on any system updates.
The Ingate apparently does not allow downgrades. I just tried and it gave me a message saying the 4.9.1 firmware could only be installed on 4.9.0 or older systems. I will try and do a packet capture and see if the Adtran is sending the MOH to the Ingate, if it is I will open a ticket with Ingate to see what they have to say about it.
BTW, that seems weird that you can't install 4.9.1 on 4.9.0 or older system but you can run 4.9.2 on it??? weird. Ask ingate about that when you call them also.
No you can only install 4.9.1 on a system running 4.9.0 or previous, it will not install on a system that is running newer code, i.e. you can't downgrade 4.9.2 to 4.9.1, and since the one we have is running 4.9.2 the 4.9.1 firmware will not install.
