kamalThanksCan somebody help me with what are the possible reasons for this.Still I get 483 from Kamailio (used as IMS server)On registration, I get 483 response from server. When I searched it in google and help, it was suggested to set the alias name properly. I set the alias name properly.I have configured as per help provided.Dear AllI have setup a Kamailio proxy for testing IMS call flows.