SIPp making REGISTER work

My Intention mainly was to test an INVITE. But after installation, found that the simulation XML was not in the test suite. 

So, created one like this 

"1.0" encoding="ISO-8859-1" ?>

"sipp.dtd">

name="REGISTER without authentication">

    

    id="noauth"/>

    request="REGISTER" />

    <![CDATA[

        

        SIP/2.0 200 OK

        [last_Via:]

        [last_From:]

        [last_To:];tag=[call_number]

        [last_Call-ID:]

        [last_CSeq:]

        Contact:

        Content-Length: 0

        Expires: 3600

        

    ]]>

   

After having the above, the SIPP was started like this below. 

./sipp -sf sipp_register_no_auth.xml -t t1

after running the client app and the REGISTER was successful. The screen showed like below. 

Tutorial in below reference section was helpful to get an idea. 

References:

http://www.bertera.it/index.php/2013/05/30/uas-authenticating-registrar-sipp-scenario/