If the device doesn&#39;t support 183 early media you may not hear the ringback.<br>The example dialplan uses generated ringback tones.<br><br>you could edit the default extension and comment out the lines that set the ringback variable<br>
and put in one that says &quot;ring_ready&quot; that would send a 180.<br><br>most devices who implement sip have no idea what they have gotten themselves into and only end up<br>implementing their one test case and not all the possible nightmares that result from trying to &quot;interop&quot;<br>
<br><div class="gmail_quote">On Fri, Feb 13, 2009 at 8:17 PM, Maxim Karp <span dir="ltr">&lt;<a href="mailto:mkarp@securesilence.com">mkarp@securesilence.com</a>&gt;</span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">









<div link="blue" vlink="purple" lang="EN-US">

<div>

<p>Hello,</p>

<p>&nbsp;</p>

<p>I am using a SNOM 320 and Windows Mobile 6 VoIP softphone on
two separate extensions.&nbsp; When dialing from the SNOM to the WM6 device I get
ringback on the SNOM but when calling the SNOM from the WM6 device I don't
get ringback though the call does complete and I get voice after the connection.</p>

<p>&nbsp;</p>

<p>Any ideas?</p>

<p>&nbsp;</p>

<p>Maxim<span style="font-size: 10pt; font-family: &quot;Courier New&quot;;" lang="EN-CA">.</span></p>

<p>&nbsp;</p>

</div>

</div>


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