The speaker to my Vodavi phone just started fading in and out. The handset sound is normal. This happened after a conference call.
Since this problem just started, I would first check to make sure there is nothing stuck inside the mic's port. Also, if you have a fan on in the room, that can also cause your speaker to fade in volume.
I say both of these because if the phone thinks you're saying something, your speaker will fade in volume. Whether you're talking or it's just air noise, the volume will fade.
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