<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=us-ascii"><meta name=Generator content="Microsoft Word 12 (filtered medium)"><style><!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:Tahoma;
panose-1:2 11 6 4 3 5 4 4 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman","serif";}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
p
{mso-style-priority:99;
mso-margin-top-alt:auto;
margin-right:0in;
mso-margin-bottom-alt:auto;
margin-left:0in;
font-size:12.0pt;
font-family:"Times New Roman","serif";}
p.MsoAcetate, li.MsoAcetate, div.MsoAcetate
{mso-style-priority:99;
mso-style-link:"Balloon Text Char";
margin:0in;
margin-bottom:.0001pt;
font-size:8.0pt;
font-family:"Tahoma","sans-serif";}
p.MsoListParagraph, li.MsoListParagraph, div.MsoListParagraph
{mso-style-priority:34;
margin-top:0in;
margin-right:0in;
margin-bottom:0in;
margin-left:.5in;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman","serif";}
span.BalloonTextChar
{mso-style-name:"Balloon Text Char";
mso-style-priority:99;
mso-style-link:"Balloon Text";
font-family:"Tahoma","sans-serif";}
span.EmailStyle21
{mso-style-type:personal;
font-family:"Calibri","sans-serif";
color:#1F497D;}
span.EmailStyle22
{mso-style-type:personal;
font-family:"Calibri","sans-serif";
color:#1F497D;}
span.EmailStyle23
{mso-style-type:personal-reply;
font-family:"Calibri","sans-serif";
color:#1F497D;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
/* List Definitions */
@list l0
{mso-list-id:1066103320;
mso-list-type:hybrid;
mso-list-template-ids:-2001805200 67698689 67698691 67698693 67698689 67698691 67698693 67698689 67698691 67698693;}
@list l0:level1
{mso-level-number-format:bullet;
mso-level-text:\F0B7;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-.25in;
font-family:Symbol;}
@list l0:level2
{mso-level-tab-stop:1.0in;
mso-level-number-position:left;
text-indent:-.25in;}
@list l0:level3
{mso-level-tab-stop:1.5in;
mso-level-number-position:left;
text-indent:-.25in;}
@list l0:level4
{mso-level-tab-stop:2.0in;
mso-level-number-position:left;
text-indent:-.25in;}
@list l0:level5
{mso-level-tab-stop:2.5in;
mso-level-number-position:left;
text-indent:-.25in;}
@list l0:level6
{mso-level-tab-stop:3.0in;
mso-level-number-position:left;
text-indent:-.25in;}
@list l0:level7
{mso-level-tab-stop:3.5in;
mso-level-number-position:left;
text-indent:-.25in;}
@list l0:level8
{mso-level-tab-stop:4.0in;
mso-level-number-position:left;
text-indent:-.25in;}
@list l0:level9
{mso-level-tab-stop:4.5in;
mso-level-number-position:left;
text-indent:-.25in;}
ol
{margin-bottom:0in;}
ul
{margin-bottom:0in;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>I only noticed it for endpoints. Don’t think we had any problems with gateways. <o:p></o:p></p><p class=MsoNormal>For PSTN I have as SIP. ICT which are H323 based and I have several MGCP QSIG trunks<o:p></o:p></p><p class=MsoNormal>So my path is<o:p></o:p></p><p class=MsoNormal>PSTN -> SIP -> CUCM -> ICT -> CUCM -> QSIG -> PBX<o:p></o:p></p><p class=MsoNormal>I haven’t had a problem with the QSIG gateway only phones when one is a SIP and the other is SCCP.<o:p></o:p></p><p class=MsoNormal>When we started having problems, most of the complaints were about dropped calls or not hearing the other end. Found that the call would connect but the RTP path would not get built.<o:p></o:p></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><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><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"'> Russell Chaseling [mailto:rchaseling@plannet21.ie] <br><b>Sent:</b> Friday, July 12, 2013 9:33 AM<br><b>To:</b> Carlo Calabrese; 'Erick Wellnitz'<br><b>Cc:</b> 'Ryan Ratliff'; 'Cisco-voip'<br><b>Subject:</b> RE: [cisco-voip] SIP between CUCM clusters<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span lang=EN-IE style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Excellent tips. Thanks guys<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-IE style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-IE style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>When you say SIP to H323 back to SIP are you talking about endpoints? My other concern is that one of these CUCM clusters already has a H323 ICT to a 3<sup>rd</sup> 8.X cluster. Calls need to be able to traverse through all of them but presence only shared between the 1<sup>st</sup> two and there are MGCP QSIG and H323 ISDN gateways hanging off all of them – I suspect I will run into more problems that will out way any possible benefits like presence sharing.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-IE style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-IE style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-IE style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div><div><div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-IE style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>for the simple reason that I believe that presence status can be shared between the two ie IP Phone BLF and CUEAC BLF (particularly CUEAC BLF)</span><span lang=EN-IE><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-IE style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><span lang=EN-IE><o:p></o:p></span></p><p><span lang=EN-IE style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>1)</span><span lang=EN-IE style='font-size:7.0pt;color:#1F497D'> </span><span lang=EN-IE style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>First questions is have I heard this right? Will BLF work between 2 x CUCM clusters? </span><span lang=EN-IE><o:p></o:p></span></p><p><span lang=EN-IE style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>2)</span><span lang=EN-IE style='font-size:7.0pt;color:#1F497D'> </span><span lang=EN-IE style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Has anyone deployed SIP trunks between clusters in production? If so is it worth the pain?</span><span lang=EN-IE><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-IE style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><span lang=EN-IE><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-IE style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Cheers</span><span lang=EN-IE><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-IE style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Russell</span><span lang=EN-IE><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-IE style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><o:p></o:p></p></div></div></div><p class=MsoNormal><o:p> </o:p></p></div></div></body></html>