Microsoft Message Analyzer is the successor of Microsoft Network Monitor which I used a lot to troubleshoot Lync.  Now Microsoft has released an updated tool that gives you more options and allows you to analyse multiple sources at once.  Now I find the Message Analyser has quite some interesting features and is easy to use.

Tested with Microsoft Message Analyser v1.0, 1.1, 1.2, 1.3

Go grab it here: Microsoft Message Analyzer v1.3
http://www.microsoft.com/en-us/download/details.aspx?id=44226

Well by default Microsoft Message Analyser does translate some of the Lync and Skype codecs but it does not work for any of the SILK or H.264 Codecs.  Would we not want to make sure Message Analyser displayed the codec instead of just the Dynamic Codec Value like you can see in the screenshot below.

This custom RTP.opn file will show all Lync & Skype codecs correctly in Microsoft Message Analyser instead of showing the default Dynamic value that is displayed whenever it does not understand the real codec.

Codecs included that are part of the Dynamic Range:

Codec 97   : "Audio, Codec: RED, ClockRate: 8000, P-Times: 20,40,60, Channels: 1";
Codec 103 : "Audio, Codec: SILK, ClockRate: 8000, P-Times: 20,40,60, Channels: 1";
Codec 104 : "Audio, Codec: SILK, ClockRate: 16000, P-Times: 20,40,60, Channels: 1";
Codec 111 : "Audio, Codec: Siren, ClockRate: 16000, P-Times: 20,40,60,100,200, Channels: 1";
Codec 112 : "Audio, Codec: G.722.1, ClockRate: 16000, P-Times: 20,40,60, Channels: 1";
Codec 114 : "Audio, Codec: RT Audio, ClockRate: 16000, P-Times: 20,40,60, Channels: 1";
Codec 115 : "Audio, Codec: RT Audio, ClockRate: 8000, P-Times: 20,40,60, Channels: 1";
Codec 116 : "Audio, Codec: G.726, ClockRate: 8000, P-Times: 20,40,60, Channels: 1";
Codec 117 : "Audio, Codec: G.722, ClockRate: 8000, P-Times: 20,40,60, Channels: 2";
Codec 118 : "Audio, Codec: Confort Noise, ClockRate: 16000, Channels: 1";
Codec 121 : "Video, Codec: RT Video, ClockRate: 90000";
Codec 122 : "Video, Codec: H.264, ClockRate: 90000";
Codec 123 : "Video, Codec: H.264 FEC, ClockRate: 90000";

Install the Custom RTP.OPN file

 

Message Analyser v 1.4 has changed the location of the RTP.OPN file

1. Close Microsoft Message Analyzer

2. Starting with Message Analyser v1.2 you need to replace the file in this path C:\Program Files\Microsoft Message Analyzer\OPNAndConfiguration\OPNs\Microsoft\MicrosoftCommon

3; and delete the following folder and subfolders C:\Users\%username%  \AppData\Local\Microsoft\MessageAnalyzer 

4. Restart Microsoft Message Analyser

 

  

Message Analyser versions before v 1.4 would have the following setup (the RTP.opn file was in another location)

1. Close Microsoft Message Analyzer

2. Starting with Message Analyser v1.2 you need to replace the file in this path C:\Program Files\Microsoft Message Analyzer\OPNAndConfiguration\OPNs\Public

3; and delete the following folder and subfolders C:\Users\%username%\AppData\Local\Microsoft\MessageAnalyzer\OPNAndConfiguration\OPNs\Public  

4. Restart Microsoft Message Analyser

 

After this change you will have to start or restart Microsoft Message Analyser and do another trace.

You  can now see correct decoding of the Skype SILK Audio codec

 

Now you can also see the H.264 Video codec