I have an ip500 digital 30 with 9508 phones on it. Whenever one of the extensions uses speakerphone, you get a terrible squealing noise. Anyone experiencing this?
I have had this too but then the sound was on the other end.
I upgraded from 8.0.16 to 8.0.18 and i thought it was gone but the customer says it came back.
I did not hear it but i rebooted the pbx last morning.
It was off and i tried it with on.
It has nothing to do with these settings on the phone.
I never ever hear a sound like this.
It is like a reversed 7.0.23 sound problem.
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