Its no different than setting up a gateway to an ITSP, you'll setup a user in the directory on FS-A, then have FS-B register to it.  You could also skip that completely and do an ACL list to authenticate the two systems against each other.

/b


On Thu, Jun 1, 2017 at 7:20 AM, Rick Jarvis <rick@magicmail.mooo.com> wrote:
Apologies if you’ve seen this before, but not sure if anyone got it due to the mail issues and I’m still scratching my hairless head ;) ...

> On 31 May 2017, at 14:57, Rick Jarvis <rick@magicmail.mooo.com> wrote:
>
> Sorry if this is a dumb question, but it’s something I’ve always struggled with that I’m convinced should be quite straightforward.
>
> Getting one FS to register with another as an extension (I know there are other ways of getting FS to talk together, but this is the situation I’m faced with).
>
> Box one (the host) is not behind NAT.
> Box two (the client) IS behind NAT.
>
> In my mind it should be good enough to have a directory entry on box one, and a SIP profile on box two, then something like a catchall dial plan entry on box 2 to accept the calls made to the ‘extension’ it’s registered as and handle the call accordingly. But I don’t think it’s that simple?
>
> I’ve looked through the soft phone configuration, which suggests using a directory entry with the register flag set to true, but this doesn’t seem to help me.
>
> Thanks
> R


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