Hello, Is it possible to configure two Kamailio servers with shared registration database? Any SIP UA can be registered on any server but it must transparently call another SIP UA which can be registered on the same or on another Kamailio server. *I configured usrloc module with below params.* ## ---------- usrloc params ------------------- #!ifdef WITH_USRLOCDB modparam("usrloc", "db_url", DBURL) *modparam("usrloc", "db_mode", 3)* modparam("usrloc", "use_domain", MULTIDOMAIN) modparam("usrloc", "timer_interval", 30) modparam("usrloc", "matching_mode", 1) modparam("usrloc", "cseq_delay", 10) modparam("usrloc", "fetch_rows", 3000) modparam("usrloc", "hash_size", 12) modparam("usrloc", "timer_procs", 4) modparam("usrloc", "handle_lost_tcp", 1) modparam("usrloc", "close_expired_tcp", 1) modparam("usrloc", "db_timer_clean", 1) modparam("usrloc", "skip_remote_socket", 0) modparam("usrloc", "server_id_filter", 0) modparam("usrloc", "preload", "location") #!endif I am not able to make a call from kam1 SIP Registered user to kam2 SIP Registered user. it would be appreciable if anyone helps me to resolve the issue. Thank you! -- Regards, Suresh Talasaniya. Contact : +91-9724264776 Skype : suresh.talsaniya