Not all of them... This has been a sticking point for the SoundPoint IP 501's.<br><br>Alex<br><br><div><span class="gmail_quote">On 6/28/06, <b class="gmail_sendername">Cullin J. Wible</b> <<a href="mailto:cwible@algorim.com">
cwible@algorim.com</a>> wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">Polycom phones support STUN - that should solve the issue too.
<br><br>Cullin<br><br>-----Original Message-----<br>From: <a href="mailto:asterisk-users-bounces@lists.digium.com">asterisk-users-bounces@lists.digium.com</a><br>[mailto:<a href="mailto:asterisk-users-bounces@lists.digium.com">
asterisk-users-bounces@lists.digium.com</a>] On Behalf Of Dr. Michael J.<br>Chudobiak<br>Sent: Wednesday, June 28, 2006 1:30 PM<br>To: Asterisk Users Mailing List - Non-Commercial Discussion<br>Subject: Re: [Asterisk-Users] Remote employees using Polycom 501 lose
<br>abilityto receive incoming calls after few minutes.<br><br>Von L. wrote:<br>> plugged in. They work immediately after being plugged in, but they<br>> lose the ability shortly thereafter. They can always make outbound
<br>> calls, but only to real phone numbers, not extensions.<br>><br>> They each have NAT routers, and I have triple checked that they have<br>> opened/forwarded the correct ports, basically 5060-30000 UDP. Once
<br>> they<br><br><br>See the "NAT Issues" section at <a href="http://www.voip-info.org/wiki/view/IAX">http://www.voip-info.org/wiki/view/IAX</a>.<br>(The page is for IAX2, but the NAT issues are relevant for UDP SIP ports
<br>too).<br><br>Basically, some NAT routers "forget" UDP mappings after a VERY short time<br>(like 30 seconds). Took me a while to figure that out.<br><br><br>- Mike<br><br>_______________________________________________
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-- <br>Alex Robar<br><a href="mailto:alex.robar@gmail.com">alex.robar@gmail.com</a>