Guest mybusinessvoice Posted October 28, 2010 Report Share Posted October 28, 2010 Hi I am using the hosted addition PBXNSIP on a VM can someone please explain how i can have up to 30 Extensions working behind NAT and have a stable system. I am using Snom handsets for all my customers Thanks Quote Link to comment Share on other sites More sharing options...
Vodia PBX Posted October 28, 2010 Report Share Posted October 28, 2010 I am using the hosted addition PBXNSIP on a VM can someone please explain how i can have up to 30 Extensions working behind NAT and have a stable system. I am using Snom handsets for all my customers Make sure: That you run the PBX on a routable (public) IP address, and make sure the firewall is not intercepting the traffic That the phones are using plug and play. If you dont want to expose the TFTP port on the server, then use HTTP for provisioning. That should be working fine. The PBX will make sure that the SIP registrations are kept alive and that the media will flow both directions. Quote Link to comment Share on other sites More sharing options...
Guest mybusinessvoice Posted October 28, 2010 Report Share Posted October 28, 2010 Make sure:That you run the PBX on a routable (public) IP address, and make sure the firewall is not intercepting the traffic That the phones are using plug and play. If you dont want to expose the TFTP port on the server, then use HTTP for provisioning. That should be working fine. The PBX will make sure that the SIP registrations are kept alive and that the media will flow both directions. Yes thats fine but i have 30 phone behind a NAT router on the customers site with 1 public IP how can the router do all the NAT for 30 handsets Thanks Quote Link to comment Share on other sites More sharing options...
Vodia PBX Posted October 29, 2010 Report Share Posted October 29, 2010 Yes thats fine but i have 30 phone behind a NAT router on the customers site with 1 public IP how can the router do all the NAT for 30 handsets Right. We have seen cases where a cheap router went belly up with so many connections (just a few weeks ago again). For NAT this is in theory no problem, but the product quality is important here. If you buy a professional router it should be no problem. NAT can have up to 65000 ports. Quote Link to comment Share on other sites More sharing options...
Pablo Posted January 19, 2013 Report Share Posted January 19, 2013 Right. We have seen cases where a cheap router went belly up with so many connections (just a few weeks ago again). For NAT this is in theory no problem, but the product quality is important here. If you buy a professional router it should be no problem. NAT can have up to 65000 ports. Am I understanding this correctly??? Would a separate port need to be assigned for each phone, on the customer's site? Quote Link to comment Share on other sites More sharing options...
Vodia support Posted January 19, 2013 Report Share Posted January 19, 2013 http://wiki.snomone.com/index.php?title=Server_Behind_NAT Quote Link to comment Share on other sites More sharing options...
Vodia PBX Posted January 19, 2013 Report Share Posted January 19, 2013 Am I understanding this correctly??? Would a separate port need to be assigned for each phone, on the customer's site? 99 % no. A reasonable good router will pick a random port, so that there is no conflict. We have seen believe it or not routers who always assign the same port like the client; those devices obviously make VoIP behind NAT pretty random. Quote Link to comment Share on other sites More sharing options...
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