How to use a specific domain in my SIP message instead of server name

[Marc Olivier]

Is there is still no way to specify a domain to auth the user with which is different than the Server Host (without using an outbound proxy (which I don't need it as a proxy)) ?

I tried lot of hack, like getting Static DNS-NAPTR setting so I can use the dns in UDP mode to get the server.1 ip, and then use the server.2 with the same DNS name but with DNS-NAPTR with the local static dns ip which would point to a different server... Nothing seem to work.

I'm just trying to connect to the servers via 2 different IP addresses, so the local pbx still need to match the same local domain information. And I need them to register at the same time.

I had this working for years now with Polycom phones, but everytime I try with Yealink, it doesn't work. So before I tell the client to replace their yealink phones, I'm just taking one last chance.