No, 603 is generic error, codec related problems are usually 488 Not Acceptable Here.<div><br></div><div>Also they are using Digitalk SBC which has no codec based restriction as far as i know.</div><div><br></div><div><a href="http://www.digitalk.com/carrier/Session_Border_Controller/">http://www.digitalk.com/carrier/Session_Border_Controller/</a></div>

<div><br></div><div>Thank you.</div><div><br><br><div class="gmail_quote">On Tue, Feb 19, 2013 at 3:05 PM, Sergey Okhapkin <span dir="ltr">&lt;<a href="mailto:sos@sokhapkin.dyndns.org" target="_blank">sos@sokhapkin.dyndns.org</a>&gt;</span> wrote:<br>

<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">g729 license will never hurt.<br>
<div class="HOEnZb"><div class="h5"><br>
On Tuesday 19 February 2013 14:57:57 Johan Helsingius wrote:<br>
&gt; &gt; I suspect the problem is codec-related. The provider behaves badly when<br>
&gt; &gt; g729 is not offered.<br>
&gt;<br>
&gt; Ah. And I guess the way to deal with that is to purchase a g729 license?<br>
&gt;<br>
&gt;       Julf<br>
&gt;<br>
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