citytelecom Posted December 8, 2011 Report Share Posted December 8, 2011 I am attempting to set up Gamma IP Authenticated trunks. According to advice from Snom I have set up as follows: Type: SIP Gateway. No account, domain or password required. Proxy Address: the gateway address. Remote Party/Privacy Indication: No Indication. The dial plan is set up correctly. On I/C calls, I get one way speech, the caller can hear the Snom user but not visa versa. O/G calls fail. On Snom phone display I see'Not Found02082662808' and I hear a busy tone. Quote Link to comment Share on other sites More sharing options...
Vodia PBX Posted December 8, 2011 Report Share Posted December 8, 2011 Sounds like you need a routable (public) IP address to get that service working in a stable way. For outgoing, you might have to check your dial plan again if it is goes to the Gamma trunk. Quote Link to comment Share on other sites More sharing options...
citytelecom Posted December 9, 2011 Author Report Share Posted December 9, 2011 Sounds like you need a routable (public) IP address to get that service working in a stable way. For outgoing, you might have to check your dial plan again if it is goes to the Gamma trunk. Thank you for your response. You're correct a public IP is required, this is the IP address used for authentication and I have this, ie, the public IP allocated to my Snom One is the CPE IP address for my IP Authenticated SIP trunk. Also, my dial plan I think is OK, my test area shows the number I am dialling routing correctly. Quote Link to comment Share on other sites More sharing options...
Vodia PBX Posted December 9, 2011 Report Share Posted December 9, 2011 Is the PBX running behind NAT? Then it would not present the public IP, it would represent it's private IP which is not routable for the service provider. Quote Link to comment Share on other sites More sharing options...
citytelecom Posted December 9, 2011 Author Report Share Posted December 9, 2011 Is the PBX running behind NAT? Then it would not present the public IP, it would represent it's private IP which is not routable for the service provider. Yes, it is running behind NAT, but I do not think you are correct. We have an identical SIP trunk on a different PBX using NAT (on the same router) and it works fine with no set up issues. The question is what fields do I fill out and how in order to get Gamma IP Authenticated SIP trunks up and working. Quote Link to comment Share on other sites More sharing options...
Vodia PBX Posted December 9, 2011 Report Share Posted December 9, 2011 Running a PBX on a private IP address is complex topic. You can check http://kiwi.pbxnsip.com/index.php/Office_with_private_and_public_IP_addresses, but all in all IMHO the easiest is to run the PBX in a DMZ without NAT or just on public IP. Quote Link to comment Share on other sites More sharing options...
citytelecom Posted December 19, 2011 Author Report Share Posted December 19, 2011 Is it possible to set up IP Authenticated trunks using NAT? Quote Link to comment Share on other sites More sharing options...
Vodia PBX Posted December 19, 2011 Report Share Posted December 19, 2011 It is possible, though not easy. A requirement is that the IP address on the public side does not change. You can configure the NAT router to forward the neccessary ports to the PBX (including RTP), and then use the IP Routing List in the Ports section of the admin settings to have the PBX change the packets that are being sent to the service provider. Quote Link to comment Share on other sites More sharing options...
Bill H Posted December 19, 2011 Report Share Posted December 19, 2011 I have attached something I wrote up some time ago to remind myself of how a PBX behind a router needs to be set up. Look it over and let me know if it helped you. Bill IP Routing List Info.doc Quote Link to comment Share on other sites More sharing options...
citytelecom Posted December 20, 2011 Author Report Share Posted December 20, 2011 I have attached something I wrote up some time ago to remind myself of how a PBX behind a router needs to be set up. Look it over and let me know if it helped you. Bill Thank you very much for that document. Could you let me know what fields on the Snom One it refers to? Quote Link to comment Share on other sites More sharing options...
Bill H Posted December 20, 2011 Report Share Posted December 20, 2011 Thank you very much for that document. Could you let me know what fields on the Snom One it refers to? Go to Admin / Settings / Ports and use the IP Routing List. I attached a Screen Shot... Bill Snom IP Route.zip Quote Link to comment Share on other sites More sharing options...
citytelecom Posted December 21, 2011 Author Report Share Posted December 21, 2011 Go to Admin / Settings / Ports and use the IP Routing List. I attached a Screen Shot... Bill Thank you Bill, good document to have and I did apply the settings according to our settings here. Whilst it did not appear to address the issue I feel we're in the right territory. It does seem that the TO and FROM headers contain the private IP address and not the public IP (which is required for IP Authenticated SIPs). Do you know at what point this information is embedded in the SIP messages? It is this IP address I need to change in the SIP headers. Quote Link to comment Share on other sites More sharing options...
citytelecom Posted December 21, 2011 Author Report Share Posted December 21, 2011 Hi Bill, Rereading your document I can see that the IP Routing setting is referred to for embedding the public IP yet it does not appear to doing this. Do I need to make any changes elsewhere in the Snom Admin or Domain settings? Peter Quote Link to comment Share on other sites More sharing options...
Bill H Posted December 21, 2011 Report Share Posted December 21, 2011 Hi Bill, Rereading your document I can see that the IP Routing setting is referred to for embedding the public IP yet it does not appear to doing this. Do I need to make any changes elsewhere in the Snom Admin or Domain settings? Peter There is no need to change anything else in the Snom One. Your local (LAN) IP Address is in the upper portion of the Invite. 10.10.1.13 in this example. Look at the second part of the Invite. This is known as the Session Description Protocol and it tells the receiving party where to reach you. INVITE sip:13@10.10.1.13 SIP/2.0 Via: SIP/2.0/UDP 10.10.1.99:5060;branch=z9hG4bK343bf628;rport From: "Test 15" <sip:15@10.10.1.99>;tag=as58f4201b To: <sip:13@10.10.1.13> Contact: <sip:15@10.10.1.99> Call-ID: 326371826c80e17e6cf6c29861eb2933@10.10.1.99 CSeq: 102 INVITE User-Agent: Snom One Max-Forwards: 70 Date: Wed, 21 Dec 2011 14:12:45 GMT Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY Supported: replaces Content-Type: application/sdp Content-Length: 258 (The Session Description starts here) v=0 o=root 1821 1821 IN IP4 173.175.145.252 <<<--- Your Public IP Address should be here. s=session c=IN IP4 173.175.145.252 t=0 0 m=audio 11424 RTP/AVP 0 8 101 a=rtpmap:0 PCMU/8000 a=rtpmap:8 PCMA/8000 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-16 a=silenceSupp:off - - - - a=ptime:20 a=sendrecv o= Owner/creator and session identifier. (This where your Public IP Address will appear) c= Connection information. Optional. (It will appear here too) Quote Link to comment Share on other sites More sharing options...
citytelecom Posted December 22, 2011 Author Report Share Posted December 22, 2011 Hi Bill, Thank you for sticking with me on this. In your example is the embedded address a public IP? Quote Link to comment Share on other sites More sharing options...
Bill H Posted December 22, 2011 Report Share Posted December 22, 2011 Hi Bill, Thank you for sticking with me on this. In your example is the embedded address a public IP? Yes. In this area: o=root 1821 1821 IN IP4 173.175.145.252 <<<--- Your Public IP Address should be here. Although it, 173.175.145.252, is just an IP Address I made up for demonstration purposes. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.