Hello Vahid,
Ofcourse, you could use multi-domain feature in Kamailio. Your customers could put in specific domain like as sip:customer1@domain1.com or sip:customer2
@domain2.com.
All customers have to send their requests to kamailio which is defined in outbound-proxy field. In kamailio, based on their domains, the requests will relay to their asterisk or upstream servers.
Thanks.
Mojtaba Esfandiari.S

On Fri, Apr 30, 2021 at 11:31 PM Vahid sadrnia <vahidsadrnia@gmail.com> wrote:
hi everybody
how can i connect multiple asterisk to kamailio and user just connect to specific asterisk(not load balancing),in fact each customer have their own media gateway(asterisk) and use kamailio for topolgy hiding.
by regards and thanks.
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--Mojtaba Esfandiari.S