<html>
<head>
<meta content="text/html; charset=ISO-8859-1"
http-equiv="Content-Type">
</head>
<body bgcolor="#FFFFFF" text="#000000">
Hello,<br>
<br>
what is the expire time of your registrations? 24 hours seems a lot
to re-register.<br>
<br>
From kamailio point of view, the contact is expired based on
un-registration or timeout. You can look with 'kamctl ul show' to
see if the phone is still registered or not.<br>
<br>
Anyhow, in such cases is good to set registration time quite small,
say 5 or 10 minutes, but if there is a problem in the client side,
it is not much to do in server side.<br>
<br>
What is the adsl routed, does it do SIP ALG? I have snom on ADSL
using tcp, does not seem to make big problems.<br>
<br>
Cheers,<br>
Daniel<br>
<br>
<div class="moz-cite-prefix">On 8/16/12 2:10 PM, Simon Hintermann
wrote:<br>
</div>
<blockquote
cite="mid:4501cdc1-a894-4b5d-837c-7f68c136cbcd@ganesh-consulting.ch"
type="cite">
<meta http-equiv="Content-Type" content="text/html;
charset=ISO-8859-1">
<meta name="Generator" content="Microsoft Word 14 (filtered
medium)">
<style><!--
/* Font Definitions */
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri","sans-serif";
mso-fareast-language:EN-US;}
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;}
span.EmailStyle17
{mso-style-type:personal-compose;
font-family:"Calibri","sans-serif";
color:windowtext;}
.MsoChpDefault
{mso-style-type:export-only;
font-family:"Calibri","sans-serif";
mso-fareast-language:EN-US;}
@page WordSection1
{size:612.0pt 792.0pt;
margin:70.85pt 70.85pt 70.85pt 70.85pt;}
div.WordSection1
{page:WordSection1;}
--></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]-->
<div class="WordSection1">
<p class="MsoNormal"><span lang="DE-CH">Hello,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="DE-CH"><o:p> </o:p></span></p>
<p class="MsoNormal">I am experiencing some disconnections with
my VOIP phones.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Let me explain:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="DE-CH">My server is an Asterisk
+ Kamailio in a datacenter with a fixed IP, and a bridge
firewall in front of it, so no NAT here.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="DE-CH"><o:p> </o:p></span></p>
<p class="MsoNormal">My client (several offices) have usually no
problem when they have a fixed IP, but encounter fatal
disconnection when they have a dynamic IP. I had the case with
Siemens, SNOM and Aastra phones, without any difference. <span
lang="DE-CH">They are of course natted behind an ADSL
router. I also have clients doing load-balance between two
ADSL lines, which is also problematic.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="DE-CH"><o:p> </o:p></span></p>
<p class="MsoNormal">The only way for me to recover is to change
the private IP of the VOIP phones. <span lang="DE-CH">Seems
more like a TCP problem or a routing problem, but I am no
network guru.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="DE-CH"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="DE-CH">I have two ADSL lines to
test it, and when I switch from one line to another, every
phone becomes „Not registered“. Even falling back tot he
first line does not help recovering. </span>I did not try
to wait for longer than 24 hours to recover.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">So my question is, more generally: is it
possible to allow the clients (VOIP phones) to re-connect with
a new IP address without having closed correctly the first
connection (SIP session, I presume)? <span lang="DE-CH">It
seems not by default, but I played with the timeouts
server-side and phone-side, without luck.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="DE-CH"><o:p> </o:p></span></p>
<p class="MsoNormal">I saw many posts with PBX having problems
when behind a dynamic IP, but nothing about the clients having
dynamic addresses or load-balancing. Normally, having a
dynamic IP does not mean that your IP will change
« on-the-fly », but each time you shut down and reboot later
your ADSL router, but we came to the conclusion that every
client NOT having a fixed IP was experiencing fatal
disconnects. <span lang="DE-CH">So I managed to test and
validate this behavior with our two ADSL lines.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="DE-CH"><o:p> </o:p></span></p>
<p class="MsoNormal">Hope someone can help me.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Greetings<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Simon<o:p></o:p></p>
</div>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
<br>
<pre wrap="">_______________________________________________
SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list
<a class="moz-txt-link-abbreviated" href="mailto:sr-users@lists.sip-router.org">sr-users@lists.sip-router.org</a>
<a class="moz-txt-link-freetext" href="http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users">http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users</a>
</pre>
</blockquote>
<br>
<pre class="moz-signature" cols="72">--
Daniel-Constantin Mierla - <a class="moz-txt-link-freetext" href="http://www.asipto.com">http://www.asipto.com</a>
<a class="moz-txt-link-freetext" href="http://twitter.com/#!/miconda">http://twitter.com/#!/miconda</a> - <a class="moz-txt-link-freetext" href="http://www.linkedin.com/in/miconda">http://www.linkedin.com/in/miconda</a>
Kamailio Advanced Training, Berlin, Nov 5-8, 2012 - <a class="moz-txt-link-freetext" href="http://asipto.com/u/kat">http://asipto.com/u/kat</a></pre>
</body>
</html>