If you are experiencing a intermittent problem with B12 addon working on some 9508 and not others. I believe the problem is not firmware, but hardware. The short line cord provided by Avaya that plug on the the 9508. It's not a solid fit, in some cases.
There is one way you can be for certain...
Hello, and Happy New Year wishes to all those dedicated and hard working telecom technicians out there.
I just upgraded my ipoffice from 7 to 8. None of my 9508s are working. Is there a download for 9508 bin file? What's funny, is that I just install a ip500 with 8.0 and all the 9508 work fine.
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