4400 Series not Supported on R10.1 or R11, but do they work?

[IPrick11]

Looking to upgrade a customer to R10.1 or R11 and they still have 4400 series phones. I know Avaya says they are unsupported, but has anyone tried them? Often unsupported phones still work.

 

[teletechman]

We have them working with only one issue on the R11 SP2. The time will generate a 1 when the phone is idle for a while, meaning that if the time is 9:00 am the phone might show 19:00. It is not military time it just seems to add the 1 to the time on the display. Everything else works fine, you can get the correct time back on the phone by lifting the handset or going on speaker.
Mike