I appreciate the thoughts posted on the this thread. If I may, I would like to rephrase the question about hosted VoIP for SMBs:<br><br>Can Asterisk allow direct media (audio) between two end points that are behind a NAT (typical SMB scenario) that is different than the the NAT where Asterisk server is located (hosted VoIP)?
<br><br>According to <b>Olle E. Johansson, </b>Asterisk guru, <br>(<a href="http://lists.digium.com/pipermail/asterisk-doc/2004-June/000547.html">http://lists.digium.com/pipermail/asterisk-doc/2004-June/000547.html</a>)<br>
<br><blockquote style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;" class="gmail_quote"><pre>Canreinvite=yes *only* works if all devices are on the same side of the NAT, the<br>
outside or the inside.<br><br>If one device is on a different side of a NAT device than another phone<br>or Asterisk, you can't allow re-invites for that device.</pre></blockquote><div><br>He attributes this limitation to Asterisk not being a true SIP Proxy. That being the case, would one have to put SER or Session Border Controller (SBC) in front of Asterisk to achieve peer-to-peer media stream directly between the endpoints thus avoiding the WAN? Or, would one have to use SipX which IS a true SIP proxy as well.
<br><br>Thanks.<br></div><br><br><br><div><span class="gmail_quote">On 11/3/06, <b class="gmail_sendername">Mike Hammett</b> <<a href="mailto:asterisk-biz@ics-il.net">asterisk-biz@ics-il.net</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;">
<div bgcolor="#ffffff">
<div><font face="Arial" size="2">How redundant is it? I'm still waiting to
hear from them directly, but is it completely 1 + 1 redundant? It might
protect against Asterisk failures, but does it then become a single point of
failure?</font></div>
<div> </div>
<div> </div>
<div>----<br>Mike Hammett<br>Intelligent Computing Solutions<br><a href="http://www.ics-il.com" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">http://www.ics-il.com</a></div>
<div> </div>
<div> </div>
<blockquote style="border-left: 2px solid rgb(0, 0, 0); padding-right: 0px; padding-left: 5px; margin-left: 5px; margin-right: 0px;"><span class="q">
<div style="font-family: arial; font-style: normal; font-variant: normal; font-weight: normal; font-size: 10pt; line-height: normal; font-size-adjust: none; font-stretch: normal;">----- Original Message ----- </div>
<div style="background: rgb(228, 228, 228) none repeat scroll 0% 50%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial; font-family: arial; font-style: normal; font-variant: normal; font-weight: normal; font-size: 10pt; line-height: normal; font-size-adjust: none; font-stretch: normal;">
<b>From:</b>
<a title="ranchlist@gmail.com" href="mailto:ranchlist@gmail.com" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">Brett</a>
</div>
<div style="font-family: arial; font-style: normal; font-variant: normal; font-weight: normal; font-size: 10pt; line-height: normal; font-size-adjust: none; font-stretch: normal;"><b>To:</b> <a title="ron@wellsted.org.uk" href="mailto:ron@wellsted.org.uk" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">
ron@wellsted.org.uk</a> ; <a title="asterisk-biz@lists.digium.com" href="mailto:asterisk-biz@lists.digium.com" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">Commercial and Business-Oriented
Asterisk Discussion</a> </div>
<div style="font-family: arial; font-style: normal; font-variant: normal; font-weight: normal; font-size: 10pt; line-height: normal; font-size-adjust: none; font-stretch: normal;"><b>Sent:</b> Friday, November 03, 2006 11:21
AM</div>
<div style="font-family: arial; font-style: normal; font-variant: normal; font-weight: normal; font-size: 10pt; line-height: normal; font-size-adjust: none; font-stretch: normal;"><b>Subject:</b> Re: [asterisk-biz] How Realistic
is Hosted VoIP for SMBs?</div>
<div><br></div></span><div><span class="e" id="q_10eaf1500f4fec59_2">You guys need to look into the Ranch Networks solution.
With a Hosted PBX, you can put the Asterisk box at you location. Then we
take a Ranch Networks box and put it at the customers site. the Ranch
Networks box does all the NAT traversal, qos, firewall, etc. plus it will
bring the media locally so you don't have to go over the internet for simple
branch to branch calls. Plus, the ranch Networks box provides high
availability or clustering if you need that. <br><br>There ya go, one box
fixes all.<br><br><br><br>
<div><span class="gmail_quote">On 10/30/06, <b class="gmail_sendername">Ron
Wellsted</b> <<a href="mailto:ron@wellsted.org.uk" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">ron@wellsted.org.uk</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;">-----BEGIN
PGP SIGNED MESSAGE-----<br>Hash: SHA1<br><br>shadowym wrote:<br>> If you
don't have full control of the network from end to end (or have <br>>
someone do that for you), it will never be a reliable solution in my
humble<br>> opinion. People are getting away with it in some
cases but the bottom line<br>> is they cannot guarantee quality of
service. <br>><br><br>I must agree with this having seen a 5 phone office
with a hosted system<br>over ADSL. The system was never reliable
and they eventually scrapped<br>it and came to us. As we are in
the same building, I setup their phones <br>on to asterisk with their own
contexts, etc. and replaced their simple<br>switch with a Linksys 224P (poe
+ layer3 managed). Inbound calls are<br>presented on a ISDN BRI
(ZapHFC), outbound via VoIP. The only comment <br>has been about
the occasional slight echo.<br><br>- --<br>Ron Wellsted<br><a href="mailto:ron@wellsted.org.uk" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">ron@wellsted.org.uk</a> <a href="http://www.wellsted.org.uk" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">
http://www.wellsted.org.uk</a><br>N
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