Hi there, I want to use sipX without a voip provider. It should "just" act as a proxy that forwards any incoming remote calls (from the internet) to my locally attached phones or acts as an outbound proxy for my phones dialing a remote SIP URI. I have all the needed NAPTR / SRV etc. records set up for my public domain, so connecting to sipX should be no problem.
What I am not sure about is if sipX is actually designed to work for remote calls (in- and outgoing) without trunking? Of course I am just talking about calling between SIP URIs, no PSTN stuff. I am asking this in advance because I have not found any references for this scenario with sipX. - Can I use sipX as a proxy for remote calls (in- and outgoing) without using a voip provider? - If yes, can sipX act as a SBC in front to avoid NAT problems with the phones behind it (with the appropriate port forwardings applied to my router, of course)? Or is this function limited to trunking? - If yes, is that working via the sipxrelay service so that remote phones will have to send their SIP signaling to port 5080 (which is the standart port for sipxrelay) ? - If SBC functionality is not possible, can I use sipX at least as a "dumb" proxy in combination with a SIP ALG? If anything of the above worked, what would I have to configure in sipX? Obviously I cannot fill out the Internet Calling form, as there is no trunk configured for which a SBC could be attached to... Thank you in advance for your help and time! BR, Robert
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