The Polycom's need to have their registration time lowered. Set it to 60 seconds which will re-register every 30 seconds. The polycom doesn't have any sort of 'keep alive' feature to keep the NAT holes open. There is information on the wiki fruther describing this and how to set it up if you don't know where to look.<br><br>p<br><br><blockquote class="replbq" style="border-left: 2px solid rgb(16, 16, 255); margin-left: 5px; padding-left: 5px;"><br>From: "Von L." <methodvon@gmail.com><br>To: asterisk-users@lists.digium.com<br>Date: Wed, 28 Jun 2006 12:04:40 -0400<br>Subject: [Asterisk-Users] Remote employees using Polycom 501 lose ability to<br> receive incoming calls after few minutes.<br><br> Hello,<br><br>Here is a breakdown of the issue I am experiencing. I have three remote<br>employees, in various states, who have Polycom 501 phones. They are<br>unable to receive incoming calls after a few minutes of the phones being<br>plugged in. They work immediately after
being plugged in, but they lose<br>the ability shortly thereafter. They can always make outbound calls, but<br>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 they<br>plug the phone it (power and ethernet) I see on the CLI console of the<br>asterisk server that the phones register:<br><br>Asterisk CVS-v1-0-12/01/04-18:46:01, Copyright (C) 1999-2004 Digium.<br>Written by Mark Spencer <markster@digium.com><br>=========================================================================<br>Connected to Asterisk CVS-v1-0-12/01/04-18:46:01 currently running on<br>bell (pid = 3652)<br>nell*CLI><br>Verbosity is at least 10<br>-- Registered SIP '3015' at XXX.XXX.XXX.XXX port 1500 expires 3600<br><br>Here is the top part of my
sip.conf<br><br>;_____________________________________________________________<br>;sip.conf<br>;_____________________________________________________________<br><br>[general]<br>port=5060<br>bindaddr=0.0.0.0<br>externip=XXX.XXX.XXX.XXX<br>localnet=XXX.XXX.XXX.XXX/255.255.255.248<br>canreinvite=no<br>tos=reliability<br>srvlookup=yes<br>disallow=all<br>allow=ulaw<br>dtmfmode=rfc2833<br>nat=yes<br>ignoreregexpire=yes<br><br>I know it has something to do with the NAT because if I plug my Polycom<br>directly into my cable modem, thus making it sit on the Internet and<br>have a real IP, everything works just fine.<br><br>I am curious what I am missing.<br><br>Thanks.<br><br>Von L.<br><br>_______________________________________________<br>--Bandwidth and Colocation provided by Easynews.com --<br><br>Asterisk-Users mailing list<br>To UNSUBSCRIBE or update options visit:<br> http://lists.digium.com/mailman/listinfo/asterisk-users<br></markster@digium.com></blockquote><br><p> 
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