One port not available in SIP/SDP packets

[vishal borkar <weeshalll () gmail com>]

Hi all .
A few days back i was sniffing the data using wireshark .The communication
in question was a Yahoo VoIP call between me and my friend.
I observed that the port on my system where the actual RTP data was flowing
was nowhere to be found in the
SIP/SDP packets.Can anyone explain to me  as to why this might be happening
?

Thanks in advance.

___________________________________________________________________________
Sent via:    Wireshark-users mailing list <wireshark-users () wireshark org>
Archives:    http://www.wireshark.org/lists/wireshark-users
Unsubscribe: https://wireshark.org/mailman/options/wireshark-users
             mailto:wireshark-users-request () wireshark org?subject=unsubscribe