In CloudShark 1.9 we added the ability to play back RTP streams so that you can replay voice data embedded in packet captures for call quality analysis. When we launched this feature, CloudShark supported G.711, G.729, and GSM voice codecs, used by many voice and mobile providers.
Since then, we’ve gotten a lot of calls (ha!) for the addition of other audio codecs to the system to be able to play them back as well.
CloudShark 1.9 includes the ability to visualize RTP streams and play them back if they contain audio. For SIP calls, CloudShark will automatically decode the conversation as an RTP stream. However, for other protocols RTP will generally use a random port - not immediately apparent to CloudShark.
You can easily work around this using CloudShark’s “decode as” feature, which tells CloudShark to treat data on a given port as a particular protocol of your choice.
CloudShark 1.9 is here! The big news here is CloudShark’s support for RTP playback of VoIP calls. This is something we’ve been excited about adding to CloudShark for awhile - when looking to add tools to CloudShark, we always make sure they are something that can benefit from the power of web technology and aid our users in collaboration on networking problems.
You can see an example capture with all of our new functionality built in here: https://www.
This challenge is over for now! Stay tuned for the next packet capture challenge! First off, thanks to everyone who sent in a solution. The solution is posted here, or try the challenge yourself below!
The Solution Unlike past challenges, this challenge involves multiple capture files with two SIP clients attempting a VoIP call behind a SIP aware router. The first capture was taken on the LAN side of the router.
We had a chance to sit down with TalkFree, a
leading international VoIP and mobile VoIP provider. As a CloudShark customer,
they’ve given us some great insight into the ways that packet surfing
technology can help VoIP providers make their troubleshooting and customer
support systems significantly simpler, easier, and more advanced than ever
before. TalkFree’s case demonstrates that passing around capture
files through email or web attachments just isn’t good enough anymore.
HOMER SIP Capture Server, a robust, carrier grade, 100% open source scalable SIP Capture system and Monitoring Application, has become the first open source application to introduce native support for CloudShark! End users of the application now have the option to upload their captures to cloudshark.org, or to their own CloudShark appliance, where they can be viewed directly in a browser or shared with others via URL.
One of the great examples of how easily CloudShark can integrate with existing tools.