leonmol Posted January 13, 2016 Report Share Posted January 13, 2016 Hi There I experience incoming call problems with SNOM 320 and IPComms VoIP service. I can make outgoing calls but cannot receive incoming calls. After some troubleshooting I determined that the server sends INVITE requests to the telephone without the line= parameter. Could someone advise what is the purpose of this uri parameter and whether it is possible to disable it? The contact tag looks like this: Contact:<sip:name@IP:port;line=ihsdmmnsd>; thanks a lot for advice Quote Link to comment Share on other sites More sharing options...
Vodia PBX Posted January 13, 2016 Report Share Posted January 13, 2016 Is there a firewall involved? Can you get a SIP log from the PBX with the call messages enabled? It should show the line parameter. Quote Link to comment Share on other sites More sharing options...
leonmol Posted January 14, 2016 Author Report Share Posted January 14, 2016 well, there is a router and an ISP (fixed IP). the router has the relevant port forwarded to the SNOM telephone. Besides, it is used with another VOIP provider and everything works just fine. as to PBX, my telephone registers with the PBX with the line parameter. They can also send the OPTIONS command with the line parameter. However, the INVITE message always comes without the line parameter for some reason what is the line parameter used for? Quote Link to comment Share on other sites More sharing options...
Vodia PBX Posted January 14, 2016 Report Share Posted January 14, 2016 Check on the router if there is something like a application layer gateway (ALG) for SIP, and if that is so, turn it off. Or just use TLS for SIP, which is the default if you automatically provision the phones. Are we talking here about problems with the phone or with the SIP trunk provider? Who is dropping the line parameter? SIP phones usually don't send OPTION messages... Quote Link to comment Share on other sites More sharing options...
leonmol Posted January 15, 2016 Author Report Share Posted January 15, 2016 there is no ALG (don't see it anywhere in settings). the problem is that I cannot configure my SNOM to work with the IPComms trunk. The PBX does not send the INVITE message with the line parameter. I cannot change PBX settings because this is with the service provider. Interestingly, my CSIP softclient on the smartphone works just fine in the same network with the same provider including incoming calls. SNOM somehow behaves differently. Is it possible to disable the line parameter at all? I could not find it in RFC 3261 ... PS. Sorry, could not understand your recommendation about TLS/SIP - this is probably done on the PBX side. Quote Link to comment Share on other sites More sharing options...
Vodia PBX Posted January 15, 2016 Report Share Posted January 15, 2016 Can you post the INVITE here in the message thread (change the phone number to something like 123456789)? Then we may be able to see where the problem is. From your description I still don't get where the problem is and if the PBX is involved at all. Quote Link to comment Share on other sites More sharing options...
leonmol Posted January 15, 2016 Author Report Share Posted January 15, 2016 Sure. See attached INVITE log anonym.txt Quote Link to comment Share on other sites More sharing options...
Vodia PBX Posted January 15, 2016 Report Share Posted January 15, 2016 Well the INVITE comes from "FPBX-2.9.0(1.8.23.1)", not from the Vodia PBX. Quote Link to comment Share on other sites More sharing options...
leonmol Posted January 16, 2016 Author Report Share Posted January 16, 2016 hmm, I was redirected here from SNOM web site so I thought you support SNOM phones too ... Quote Link to comment Share on other sites More sharing options...
Vodia PBX Posted January 17, 2016 Report Share Posted January 17, 2016 No we can help you only with the Vodia PBX... Quote Link to comment Share on other sites More sharing options...
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