citytelecom

Thank you for your response. Yes, I have followed the steps as given in both the manual and the wiki (I think I have covered everything).

I have a Snom One stand alone unit. I am connecting a couple of Snom 360's and a 320. I have ensured that the 'Listen to sip.multicast.net' is turned on. I have created my accounts and entered the MAC addresses in the 'Bind to MAC address' field. I now connect my phones but they are not connecting and downloading from the Snom one. Am I missing something? Any assistance would be much appreciated.

Hi Bill, Thank you for sticking with me on this. In your example is the embedded address a public IP?

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

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.

Thank you very much for that document. Could you let me know what fields on the Snom One it refers to?

Is it possible to set up IP Authenticated trunks using NAT?

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.

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.

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.