<div dir="ltr">Hi All,<br><br>I read all URL which was mention on post. Now SIP,UDP and RTP communication process is clear, the way of communication and port's used in that process. <br><br><a href="http://blog.lithiumblue.com/2007/07/understanding-relationship-between-sip.html">http://blog.lithiumblue.com/2007/07/understanding-relationship-between-sip.html</a><br>
<br>This blow is best for understanding the packet reading and port information. Nice blog.<br><br>As per that blog UDP and RTP both are used in SIP communication process and RTSP is used with RTP for controlling the packets. <br>
<br><br><br><div class="gmail_quote">On Thu, Feb 23, 2012 at 6:12 AM, Gilles <span dir="ltr"><<a href="mailto:codecomplete@free.fr">codecomplete@free.fr</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div class="im">On Wed, 22 Feb 2012 18:04:38 -0600, "Kevin P. Fleming"<br>
<<a href="mailto:kpfleming@digium.com">kpfleming@digium.com</a>> wrote:<br>
>SIP is most commonly transported over UDP, not TCP.<br>
<br>
</div>To complicate things further, there's "symmetric RTP":<br>
<br>
"A device supports symmetric RTP if it selects, communicates, and uses<br>
IP addresses and port numbers such that, when receiving a<br>
bidirectional RTP media stream on UDP port "A" and IP address "a", it<br>
also transmits RTP media for that stream from the same source UDP port<br>
"A" and IP address "a". That is, it uses the same UDP port to<br>
transmit and receive one RTP stream.<br>
<br>
A device that doesn't support symmetric RTP would transmit RTP from a<br>
different port, or from a different IP address, than the port and IP<br>
address used to receive RTP for that bidirectional media steam."<br>
<a href="http://www.armware.dk/RFC/rfc/rfc4961.html" target="_blank">www.armware.dk/RFC/rfc/rfc4961.html</a><br>
<div><div></div><div class="h5"><br>
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</div></div></blockquote></div><br><br clear="all"><br>-- <br><div dir="ltr"><br>Thanks and regards<br><br> Virendra Bhati<br>+91-8885268942<br>Software Engineer<br>E-mail-: <a href="mailto:virbhati@gmail.com" target="_blank">virbhati@gmail.com</a><br>
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