I have a ticket open with Avaya right now for loud background noise on newer 9608G phone sets (black label). The older phones with a white label don't seem to have the issue. The ticket has been going on now 2 months or so with more and more wiresharks requested all the time. Basically when not talking the user hears loud hiss in the background that changes in pitch. This is IP Office 10.1, 9608G phones on ATT SIP lines--various new firmware releases have been tried with the latest release being the loudest. I think the noise is there on 9608 white label phones a bit but far far in the background. The usual AGC stuff doesn't do anything.
Anyone noticed this behavior? Perhaps you have to be on ATT SIP to hear it?
We have only just begun deploying these phones with the black label...
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