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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Hello</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> </span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I am in the process of evaluating a SIP stack for IMS
enhancements (for CSCF). I compared SIPx<font color=navy><span
style='color:navy'>, SER</span></font> and reciprocate stacks for CSCF
development. </span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>SER:</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Pros:</span></font></p>
<ol start=1 type=1>
<li class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Can run as registrar/proxy/redirect server</span></font></li>
<li class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>TLS support for Security</span></font></li>
<li class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Support for NAT</span></font></li>
<li class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Web based management interface</span></font></li>
<li class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>IPv6 support</span></font></li>
</ol>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Cons:</span></font></p>
<ol start=1 type=1>
<li class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>GPL license</span></font></li>
</ol>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'> </span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Resiprocate:</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Pros:</span></font></p>
<ol start=1 type=1>
<li class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Slightly less distributed architecture than SIPx</span></font></li>
<li class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Can run as registrar/proxy/redirect server</span></font></li>
<li class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>TLS support for Security</span></font></li>
<li class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Support for NAT</span></font></li>
<li class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Web based management interface</span></font></li>
<li class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>IPv6 support</span></font></li>
<li class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Maximum standards compliance</span></font></li>
</ol>
<p class=MsoNormal style='margin-left:.5in'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>Many IMS headers are supported in
latest release 1.0</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> </span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>SIPx: </span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Pros:</span></font></p>
<ol start=1 type=1>
<li class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Complete SIP based IP-PBX solution</span></font></li>
<li class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Distributed architecture</span></font></li>
<li class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Can run as registrar/proxy/redirect server</span></font></li>
<li class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>TLS support for Security</span></font></li>
<li class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Support for NAT</span></font></li>
<li class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Web based management interface</span></font></li>
</ol>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Cons:</span></font></p>
<ol start=1 type=1>
<li class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Missing IPv6 support</span></font></li>
<li class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Large footprint</span></font></li>
</ol>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'> </span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'> </span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I have following queries:</span></font></p>
<ol start=1 type=1>
<li class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Can somebody point out if anything out of above is not
correct or if people can add more?</span></font></li>
<li class=MsoNormal><font size=3 color=navy face="Times New Roman"><span
style='font-size:12.0pt;color:navy'>Which stack is more actively being
used for IMS enhancements?</span></font></li>
<li class=MsoNormal><font size=3 color=navy face="Times New Roman"><span
style='font-size:12.0pt;color:navy'>Are there any plans for near future
SER release with IMS support (CSCF mainly)?</span></font></li>
</ol>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'> </span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Regards,</span></font></p>
<p class=MsoNormal><st1:PersonName style="BACKGROUND-POSITION: left bottom; BACKGROUND-IMAGE: url(res://ietag.dll/#34/#1001); BACKGROUND-REPEAT: repeat-x"><font
size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'>Gaurav Kansal</span></font></st1:PersonName></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> </span></font></p>
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