<div>From: <a href="http://www.voip-info.org/wiki/view/Asterisk+sip+qualify">http://www.voip-info.org/wiki/view/Asterisk+sip+qualify</a></div>
<div>"If you turn on <strong>qualify</strong> in the configuration of a SIP device in <a title="Asterisk config sip.conf" href="http://www.voip-info.org/wiki/view/Asterisk+config+sip.conf">sip.conf</a>, Asterisk will send a SIP <a title="SIP method options" href="http://www.voip-info.org/wiki/view/SIP+method+options">OPTIONS</a> command regularly to check that the device is still online. If the device does not answer within the configured (or default) period (in ms) Asterisk considers the device off-line for future calls. This status can be checked by the <a title="Asterisk func sippeer" href="http://www.voip-info.org/wiki/view/Asterisk+func+sippeer">SIPPEER function</a>, and inversely this function will only provide status information for peers which have <strong>qualify=yes</strong>."<br>
</div>
<div>My guess is that your Nat/firewall is closing the connection after some time the phone is idle, so this way Asterisk will make sure to always have communication going trhough that connection so your NAT/firewall won't just close it.</div>
<div> </div>
<div>try playing with qualifyfreq as well.</div>
<div> </div>
<div>Let us know if it helped.</div>
<div> </div>
<div>Alyed</div>
<div> </div>
<div><br> </div>
<div class="gmail_quote">2010/3/27 James Lamanna <span dir="ltr"><<a href="mailto:jlamanna@gmail.com">jlamanna@gmail.com</a>></span><br>
<blockquote style="BORDER-LEFT: #ccc 1px solid; MARGIN: 0px 0px 0px 0.8ex; PADDING-LEFT: 1ex" class="gmail_quote">Hi,<br>I have about 10 Cisco 7960s behind a PIX 506E (IOS v6.3) firewall.<br>After some period of time, asterisk says that some of them are<br>
unreachable, and the phones lose their registration.<br>The only way to make the phones recover is to clear the NAT<br>translation tables for the phones on the PIX (clear xlate...)<br>Does anyone know how to fix this? As you can imagine, it is quite<br>
annoying. And it does not happen to all the phones either.<br><br>sip fixup is enabled on the PIX<br><br>phone config parts:<br><br>nat_enable : 1<br>nat_received_processing : 0<br>nat_address: [public ip of PIX]<br><br>Thank you.<br>
<br>-- James<br>(Please CC me on all replies)<br><br>--<br>_____________________________________________________________________<br>-- Bandwidth and Colocation Provided by <a href="http://www.api-digital.com/" target="_blank">http://www.api-digital.com</a> --<br>
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