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<p class="MsoNormal">People,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-US">Can anyone give me a good reference on books that explain the SIP Protocol?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I already have a significant working knowledge on SIP. I have set up some trunks On CUCM and CUBE and troubleshooted many more. But I am still lacking on the WHYs of many things. So I am looking, for example, for theoretical
explanations of SIP call flows and the variations of headers and options, without being dry as hell as a RFC or Cisco technical documents. Some good book that can be used as reference material.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">One of the issues I have with Cisco tech notes is that when they do examples-by-debug often they lack explanations or discussion of possibilities.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">What have you people read and can recommend?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="PT-BR" style="font-size:12.0pt;font-family:"Arial",sans-serif;color:white;background:red;mso-highlight:red">Ariel Pablo Roza</span><span lang="PT-BR" style="font-family:"Arial",sans-serif;color:white"><o:p></o:p></span></p>
<p class="MsoNormal"><b><span lang="EN-US" style="font-family:"Arial",sans-serif;color:#3F4243;mso-fareast-language:ES">Post Sales UC Engineer / Southern Cone</span></b><span lang="EN-US" style="font-family:"Arial",sans-serif;color:#404040">
</span><span lang="PT-BR" style="font-family:"Arial",sans-serif;color:#404040"><img width="236" height="11" style="width:2.4583in;height:.1145in" id="Imagem_x0020_1" src="cid:image005.png@01D761DD.4AD1D050"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="PT-BR" style="font-family:"Arial",sans-serif;color:#404040"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="PT-BR" style="font-family:"Arial",sans-serif;color:#404040">t: (011) 5282-0458<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="PT-BR" style="font-family:"Arial",sans-serif;color:#404040">m: (011) 5017-4417<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="PT-BR" style="font-family:"Arial",sans-serif;color:#404040">ariel.roza@la.logicalis.com<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="PT-BR" style="font-family:"Arial",sans-serif;color:#404040">Av. Belgrano 955 – Piso 20 - C1092AAJ<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="PT-BR" style="font-family:"Arial",sans-serif;color:#404040">CABA – Buenos Aires - Argentina<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="PT-BR"><a href="http://www.la.logicalis.com/"><span style="font-family:"Arial",sans-serif;color:red">www.la.logicalis.com</span></a></span><span lang="PT-BR" style="font-family:"Arial",sans-serif;color:#404040"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="PT-BR"><o:p> </o:p></span></p>
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