<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=Content-Type content=text/html;charset=iso-8859-1>
<META content="MSHTML 6.00.6000.16674" name=GENERATOR></HEAD>
<BODY id=MailContainerBody
style="PADDING-RIGHT: 10px; PADDING-LEFT: 10px; PADDING-TOP: 15px"
bgColor=#ffffff leftMargin=0 topMargin=0 CanvasTabStop="true"
name="Compose message area">
<DIV><FONT size=2>Hi,</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>I am analyzing a simple scenario of SIP message
exchanges for call setup between two SIP end-point and a
sip proxy. The SIP signaling messages for call setup are exchanged between
two SIP end-points (using SIPp uac and uas) via the openSER intermediary proxy.
</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>Caller
Callee</FONT></DIV>
<DIV><FONT size=2>SIPp-UAC --> openSER --> SIPp-UAS</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>No delay has been set between 180, 200 responses messages sent
by callee (SIPp-UAS). </FONT><FONT size=2>After using SIPp to create more
than 200 cps, openSER starts sending messages out of order (sending 200 before
180). This causes all calls to fail.</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>PS: 1000 cps is tested successfully with SIPp excluding
openSER.</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>Is there someone who can give me some advice?</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>Regards,</FONT></DIV>
<DIV><FONT size=2>alirsm</FONT></DIV></BODY></HTML>