<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">I have two gateways setup like this:<div><br></div><div><a href="http://pastebin.com/m41092fa6">http://pastebin.com/m41092fa6</a></div><div><br></div><div>I have two dialplans setup as follows:</div><div><br></div><div><a href="http://pastebin.com/mde96a74">http://pastebin.com/mde96a74</a></div><div><br></div><div>Everything works fine for the first provider, but the second provider drops calls after about 30 seconds. I've been told it's a NAT issue, but would only one provider be dropping calls ? If re-registration is interrupting calls I would have thought it would do it on both providers. It was suggested that I configure one gateway to use a different port and I've tried setting the port like this:</div><div><br></div><div><span class="Apple-style-span" style="color: rgb(0, 153, 0); font-family: 'Courier New'; font-size: 11px; "><span class="re1" style="font-weight: bold; color: black; "><param</span> <span class="re0" style="color: rgb(0, 0, 102); ">name</span>=<span class="st0" style="color: rgb(255, 0, 0); ">"realm"</span> <span class="re0" style="color: rgb(0, 0, 102); ">value</span>=<span class="st0" style="color: rgb(255, 0, 0); ">"sip.pennytel.com:50601"</span><span class="re2" style="font-weight: bold; color: black; ">/></span></span></div><div><font class="Apple-style-span" face="'Courier New'" size="3"><span class="Apple-style-span" style="font-size: 11px;"><b><br></b></span></font></div><div>But I can't get it to register. I've tried connecting my softphone (X-Lite) directly to either provider by specifying the hostname as sip.providername.com:5061 and it can't register either. Is this the correct way to specify a SIP port to use or is it just that my provider doesn't listen on any other ports than 5060 ? When I specify sip.pennytel.com:5060 it still registers fine.</div><div><br></div><div>Is this the best way to solve my problem ? By using an alternate SIP port ? Or is there likely to be any other reason why calls are dropping out ?</div><div><br></div></body></html>