Had a IPO that was at R10.0.0.3 upgraded them to R11.4.13 which is a patch release because of upgrade issues. The 9608 phones went from firmware 6.6.401 to 6.8.02. This introduced Audio problems on thier headsets, echo, static and low volume. I then downloaded the latest firmware 6.8.3 and it fixed it a little but they still have issues with the headsets. The headsets are Plantronics CO52 and they talked to them for the correct settings on the headsets.
My thought is to downgrade the 9608 phones back to the 6.6.401 firmware and see if that will fix it but I wanted to see if anyone has any other thoughts before doing that.
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