Following lines are an extract from the SIPit preliminary report regarding supported DNS features in current implementations:<br><br>&gt;160 people from 16 countries attended SIPit 18 with <strong>73</strong> different SIP implementations:
<br><br>&gt;Full 3263 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;25<br>&gt;3263 (no naptr,SRV on) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;13<br>&gt;A only &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;22<br>&gt;IP only (no DNS) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;9<br><br>Which&nbsp;gives&nbsp;a&nbsp;percentage&nbsp;of&nbsp;38/73 supporting SRV records, so more or less half of the implementations supports this type of load balancing.
<br><br>This value should be used with care because implementations include both UAs and proxies/redirect/* servers.<br>I can also say that a higher percentage of desktop SIP phones supports DNS SRVs, but since it's just my impression from the ones I have touched I can not assure nor give a percentage...
<br><br>Hope it helps,<br><br>Samuel.<br><br><br><br><div><span class="gmail_quote">2006/7/6, G.Jacobsen &lt;<a href="mailto:g_jacobsen@yahoo.co.uk" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)"> g_jacobsen@yahoo.co.uk
</a>&gt;:</span><blockquote class="gmail_quote" style="margin-top: 0; margin-right: 0; margin-bottom: 0; margin-left: 0; margin-left: 0.80ex; border-left-color: #cccccc; border-left-width: 1px; border-left-style: solid; padding-left: 1ex">
<div><div><div><span><font face="Arial" color="#0000ff" size="2">Samuel,</font></span></div><div>&nbsp;</div><div><span>Do you happen to know what percentage of UAs  out there are really </span>&quot;Compliant&quot; UAs&nbsp;<span>
 ?</span></div><div>&nbsp;</div><div><span><font face="Arial" color="#0000ff" size="2">My  impression so far regarding SRV DNS records is that they are theoretically a  nice feature but unfortunately almost useless since one needs to cater for those  non-compliant UAs anyway. I would love to be convinced&nbsp;of the  contrary. 
</font></span></div><div>&nbsp;</div><div><span><font face="Arial" color="#0000ff" size="2">Can  anyone supply real usage&nbsp;figures regarding compliant/non-compliant UAS  ?</font></span></div><div>&nbsp;</div><div><span><font face="Arial" color="#0000ff" size="2">
 TIA</font></span></div><div>&nbsp;</div><div><span><font face="Arial" color="#0000ff" size="2">Gerry</font></span></div></div><div><span><div>&nbsp;</div><div>&nbsp;</div><div>&nbsp;</div><blockquote><div dir="ltr" align="left"><font face="Tahoma" size="2">
-----Original Message-----<br><b>From:</b>    <a href="mailto:serusers-bounces@lists.iptel.org" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">serusers-bounces@lists.iptel.org </a>    [mailto:<a href="mailto:serusers-bounces@lists.iptel.org" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">
serusers-bounces@lists.iptel.org</a>]<b>On Behalf Of    </b>samuel<br><b>Sent:</b> Donnerstag, 6. Juli 2006 14:52 <br><b>To:</b> Ritesh    Jalan<br><b>Cc:</b> seruser List<br><b>Subject:</b> [Bulk] Re: [Serusers]    Global Failover Server
<br><br></font></div><br>Look at RFC 3623.<br>Cofigure    two SRV entries in    your&nbsp;DNS,&nbsp;one&nbsp;pointing&nbsp;to&nbsp;the&nbsp;UAS&nbsp;SERver&nbsp;and&nbsp;another&nbsp;to&nbsp;the&nbsp;UK&nbsp;server.    &quot;Compliant&quot; UAs will try to contact the other proxy upon failure of their    current one. 
<br><br>Samuel.<br><br><div><span class="gmail_quote">2006/7/5, Ritesh Jalan &lt;<a href="mailto:ritesh.j@net4.in" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">ritesh.j@net4.in</a>&gt;:</span>    
<blockquote class="gmail_quote" style="padding-left: 1ex; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0.80ex; border-left-color: #cccccc; border-left-width: 1px; border-left-style: solid"><div><div bgcolor="#ffffff">
<div><font face="Arial" size="2">Hi All</font></div><div>&nbsp;</div><div><font face="Arial" size="2">Pls. guide me how can we implement failover on      SIP Server located globally, Like one server in USA another in UK.       
</font></div><div>&nbsp;</div><div>&nbsp;</div><div>&nbsp;</div><div><font face="Arial" size="2">Ritesh Jalan <br>Mobile: 91-9818616329 <br>MSN:      <a href="mailto:ritesh_jalan@hotmail.com" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">
 ritesh_jalan@hotmail.com</a>      <br></font></div></div></div><br>_______________________________________________<br>Serusers      mailing list<br><a href="mailto:Serusers@lists.iptel.org" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">
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