I have a IAD with PRI interface and &nbsp;multiple &nbsp;SIP users. I do not want to register each user on Freeswitch.<div>I do still want each user to be able to send call and receive call.&nbsp;</div><div>For sending call from IAD to FS, since all the sip calls have to go through SIP-router (Kamailio) and then routed to FS, I am thinking using X-AUTH-IP in ACL so no auth required.&nbsp;</div><div>For &nbsp; receiveing call from FS, I am thinking either to setup each user on FS and &nbsp;manually create contact information and make them never expire or add cidr to each user and modify dial-string to use cidr instead of sip contact. Are these approaches workable? &nbsp;What is the best way to do this?</div><div><br></div><div>Gary &nbsp;</div>