Overview

The AudioStat utility allows audio driver statistics to be viewed in real time. The information provided by AudioStat can help isolate audio quality issues due to packet delay and codec-related problems.

Caution: We recommend using this tool only with Cisco TAC supervision.

Requirements/Special Notes

This tool runs only on Unity 4.0(1) and later and requires the Cisco Unity-CM TSP version 7.0(3) or later. You can get the latest TSP versions at the Cisco Unity Download Page on CCO. You can check compatibility between the TSP, Unity and Call Manager versions in the Compatibility Matrix Document.

Global Tab

The Global tab displays information about the number of incoming and outgoing packets, RTP header errors, playback and
recording counts, the number of out-of-sequence packets, and the number of times silence was inserted.

Field	Description
G711 Packets	Number of incoming and outgoing G.711 and G.729a RTP packets Note that packets are constantly being received, even if a recording is not in progress.
G729 Packets
Other Packets	Number of other types of RTP packets sent and received, such as AVT tones, unknown audio formats received, etc.
Out of sequence	Number of packets received out of sequence
RTP header errors	Number of RTP headers that were invalid
Exceeded silence threshold	Usually indicates that silence was inserted by the audio driver due to a missing packet. A missing packet does not necessarily mean that there is a network issue. Some IP devices may not send any audio packets when the audio that would otherwise be sent is silence
Playback Count and Record Count	Number of playbacks and recordings

Device Tab

The Device tab displays the current status for each device. A red icon in the Device column indicates a recording in progress.
When a recording ends, the data from that recording is displayed in the Record Log tab.

To sort by a column, click the column heading.

Field	Description
Device	Audio device number used for the recording. A red icon indicates a recording in progress.
State	Current activity
Start Time	Time recording started
Avg (ms)	Average time between packets (in milliseconds)
Src IP Addr	Source IP address of the recording (IP phone, gateway, etc.)
Src Port	Source IP port of the recording
Codec	Recording format
Local Port	UDP port number used by Cisco Unity for the recording
Duration	Length of the recording (in seconds)
Silence inserted	Number of seconds of silence inserted

Record Log Tab

The Record Log tab displays a log of recording sessions. By default, the log is sorted by recording end time.

To sort by a column, click the column heading.

To change the maximum number of lines that are displayed in the Record Log window, click Settings > Options.

To save the data in the Record Log window to an output file, click Settings > Logging, then specify a file name and location.

Field	Description
Device	Audio device number used for the recording
Start Time	Time recording started
End Time	Time recording ended
Avg (ms)	Average time between packets (in milliseconds)
Src IP Addr	Source IP address of the recording (IP phone, gateway, etc.)
Src Port	Source IP port of the recording
Codec	Recording format
Local Port	UDP port number used by Cisco Unity for the recording
Duration	Length of the recording (in seconds)
Silence inserted	Number of seconds of silence inserted

Obtaining Updates

To check for updates to this tool, visit http://www.ciscounitytools.com/

Revision History

1.0.3

Added Codec field to the Device and Record Log tabs.

1.0.2

Added the Device tab, and new functionality to the Record Log tab.

1.0.1

First release.