Listen to the call from RTP packets
Listen to the call from RTP packets
1. Open the capured packets with Wireshark
2. Select [Statistics] > [VoIP Calls]
3. In the popup window of detected calls, highlight the call you want to listen and click [Play] then [Decode]
4. In the RTP Player window, select the dircetion of the call and play
Retrieve the ulaw data from captured packets
1. Open the file by wireshark
2. From menu bar, click [Statistics]>[RTP]>[Show all stream]
3. From pop-up “RTP Streams” window, select the stream you want to retrieve and [Analyze] button
4. From pop-up “RTP Stream Analysis” window, click [Save payload]
5. At next window, select
[Format]: .raw
[Channels]: forward
[Selection:] text area: type in a file name end with .ul (such as: test.ul)
6. Click [ok] to save the RTP stream as .ul format
To convert ul file to wav file
1. Download SoX sound exchange program from http://sox.sourceforge.net
2. From command line, run “sox test.ul test.wav” to convert ul file to wav format