Unity 3.1.3, Call Manager 3.2.2. When a user picks up a message from voice mail they hear a noise (hissing) at the end of the message. They also hear a noise at the end of some greetings that are recorded by the users. This is a network that is all G729. This noise happens from both the PSTN and IP phones. I am not sure what I need to do to quite the noise.
