In RTP, what values should I expect in Mark, Seq and Time?
The Mark flag is an indicator that this is the first packet after a gap in audio. This may be the very first packet of audio for the call, or it may be the first packet after a silence supression gap. Seq is a sequence number. This increments by 1 in every RTP packet carrying audio data. If there is a silence supression gap, the first packet after the gap has a sequence value 1 higher than the last packet before the gap. At the start of a call Seq may start at any value. There is no correlation between Seq numbers in outbound RTP and Seq numbers in inbound RTP. Time is the send time of the RTP packet and is measured in 1/8th seconds (125ms periods). At the start of a call Time may start at any value. There is no correlation between the starting Time value in outbound RTP and the starting Time value in inbound RTP. • Asterisk interop Asterisk is a proxy toolkit in its raw form, customers have told us that it typically takes about 6 months development to get it into a production usable s
