Users are reporting garbled voice mail message recordings left by callers from the PSTN.
Which of the following actions is not a step in troubleshooting this issue?

A.
Confirm that the connection to the caller is clear.

B.
Obtain a sniffer capture at the closest point to Unity Connection.

C.
Use network analysis tools to check for latency and packet loss.

D.
Modify the target decibels configured in AGC.

Explanation:
You do not need to modify the target decibels configured in Automatic Gain Control (AGC). AGC is a Cisco
Unity Connection feature that enables Unity Connection to automatically adjust the audio volume of calls. You
can disable or adjust AGC settings if users report that the audio volume of voice mail recordings is always too
loud or always too quiet. However, the AGC feature does not typically produce garbled recordings.
When troubleshooting garbled voice mail message recordings left by callers from the public switched telephone
network (PSTN), you should first confirm that the connection to the caller is clear. For example, a voice mail
message could become garbled if a mobile phone caller is traveling through an area with a weak or intermittent
signal. If this is the case, there is nothing you can do to solve the issue. You can confirm that the connection is
clear by asking the mobile caller to place another call to the voice mail system or by placing calls to the voice
mail system from other mobile phones.
If voice mail messages are still garbled when the connection is clear, you should next use network analysis
tools to check for latency and packet loss. Network analysis tools enable you to determine whether the network
itself is causing the garbled audio stream. For example, mismatched packet size configurations among voice
devices on the network could cause packet loss or delay that might affect the quality of voice mail recordings.
As a final troubleshooting step, you should obtain a sniffer capture at the closest point of the recording to Unity
Connection. This will help you determine whether the audio stream is being garbled before or after Unity
Connection records it. If the stream is not garbled before Unity Connection records it, there might be a problem
with Unity Connection itself.

Cisco: Troubleshooting Guide for Cisco Unity Connection Release 8.x: Troubleshooting a Garbled Audio
Stream in the Network