One-X Firmware Downgrade Possible?

[CChambleeJr]

One of our customers just tried to install new replacements for a few 9608 desk phones, and they will not fully register to our CM 6.0.1 JITC CM. We are running firmware 6.3.0.37 on all of our phones as the standard load. The new phones came with 6.4.0.1. None of the new phones will register, regardless of which type phone that we alias them with. Our HTTP file server has the 6.3.0.37 load available, but these new phones, when rebooted SEE the new older firmware, but when try ti obtain the file they report "Invalid file", and skip the downgrade. Is there a way to force these phones to downgrade to the firmware currently on the file server?

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Chuck Chamblee
ACSS (CM) | CTP | A+ ce | Security+ ce

 

[gwebster]

Have a look at

https://downloads.avaya.com/css/P8/documents/101023924

and the appendices. It shows the various hardware vintages and minimum software releases which will run on that vintage. If you are trying to downgrade to a version which is not supported, the phone will reject it.