I have a couple of questions regarding RTP.
The background of my inquiry is that I have packet captures of SIP and RTP traffic on an Asterisk and Broadworks SIP trunk and the RTP many times has a time stamp that rewinds by 480 using g.711u. The Sequence number continues to increment appropriately, but the timestamp just rewinds.
It doesn’t happen on every call, but it’s frequent enough to make me want to understand it better.
My questions are:
Is there ever a circumstance where it would be normal or logical to see the RTP timestamp go backwards during the RTP stream?