Today I had an issue where I had to capture the media and SIP information on a particular call, many people forget the toolsets on the SBC’s which can give you a wealth of stream information.
- Goto: Diagnostics screen
- Goto: Packet Capture menu
- Start the capture process
Select your primary interface that sends / recieves your stream / RTP media:
You can keep all the settings as default and capture the lot, beware, depending on how long you are capturing this filesize can grow very quickly:
Once this is complete just download the PCAP and open in wireshark for the full analysis of the stream.
Great reference: https://wiki.wireshark.org/VoIP_calls
On this case it was upstream and usually takes a finger point in the right direction for the carrier.