Huge thanks to our Platinum Members Endace and LiveAction,
and our Silver Member Veeam, for supporting the Wireshark Foundation and project.

Wireshark-users: Re: [Wireshark-users] How calculate dealy VoIP communication

From: "RUOFF, LARS (LARS)** CTR **" <lars.ruoff@xxxxxxxxxxxxxxxxxx>
Date: Mon, 22 Mar 2010 11:29:36 +0100
You can't get it directly.
Unless you have a capture on both ends and synchronised clocks for both captures. You may then compare send and receive times.

But there's another way:
Actually, most of the time, RTP endpoints do measure the round-trip delay while in conversation and exchange that information via RTCP.
So you can watch for RTCP packets in your captures and extract the info from there.
See RFC 3550. 

Lars Ruoff


	From: wireshark-users-bounces@xxxxxxxxxxxxx [mailto:wireshark-users-bounces@xxxxxxxxxxxxx] On Behalf Of Salvatore Frandina
	Sent: dimanche 21 mars 2010 11:07
	To: wireshark-users@xxxxxxxxxxxxx
	Subject: [Wireshark-users] How calculate dealy VoIP communication
	I know how to calculate the bandwidth, jitter and loss packets of RTP traffic. How can I estimate the mean delay?
	Salvatore Frandina
	mail: salvatore.frandina@xxxxxxxxx