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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Yea I have done something like this before.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Used H323 gateways for termination, used an Intercluster Trunk to route calls into the new cluster, and then H323 back out to the pstn.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Cannot see any issues changing it up from H323 to SIP for the out bound calls.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> cisco-voip-bounces@puck.nether.net [mailto:cisco-voip-bounces@puck.nether.net]
<b>On Behalf Of </b>Erick Wellnitz<br>
<b>Sent:</b> Wednesday, May 16, 2012 1:31 PM<br>
<b>To:</b> cisco-voip<br>
<b>Subject:</b> [cisco-voip] two clusters - same gateway sanity check<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Okay...I've been thinking (it happens once in a while) over some things and wanted to do a sanity check.<o:p></o:p></p>
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<p class="MsoNormal">1. Instead of using H323 to a gaateway has anyone had success using sip? Would this require the use of MTP? How would this impact SRST? I know MGCP would be ideal but then we lose our ability to monitor PRI traffic until I can justify
dishing out the cash for Cisco's UC management suite. Will SIP allow us to receive calling name from the PSTN in a similar fashion as h323? In my viery vivid imagination this should jsut be a simple SIP trunk from CM to the GW.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">2. If I use h323 to/from the old CM cluster would I feasibly be able to use SIP from the new cluster simultaneously then move inbound over to SIP at a later date?<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Initial Outbound Scenario:<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">CM Cluster 1 ----->h323---<o:p></o:p></p>
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<p class="MsoNormal"> | <o:p></o:p></p>
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<p class="MsoNormal"> --->39XX Gateway----->PRI<o:p></o:p></p>
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<p class="MsoNormal"> |<o:p></o:p></p>
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<p class="MsoNormal">CM Cluster 2 ------>SIP----<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Initial Inbound Scenario:<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">CM Cluster 1 <-----h323<------39XX Gateway <----PRI<o:p></o:p></p>
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<p class="MsoNormal"> | <o:p></o:p></p>
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<p class="MsoNormal"> |<o:p></o:p></p>
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<p class="MsoNormal"> V<o:p></o:p></p>
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<p class="MsoNormal">CM Cluster 2<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">My main goal is to be able to completely test the new cluster without impacting end users at all. I could do the same scenario with h323 but I'd rather use SIP because it would make things very easy as we migrate to SIP trunking for PSTN
access. All I have to do then is point the same SIP trunk to a CUBE instead of messing with call routing on the CM.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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