Hello Dadang, ...inside route[LOCATION] *Server1:* if(!lookup("location") { xlog("Failed to Find user online in this server, maybe try Second server\n") $ru = "sip:" + $rU + "(a)192.168.15.30"5.30"; route(RELAY); } *Server2:* if(!lookup("location") { xlog("Failed to Find user online in this server, maybe try First server\n") $ru = "sip:" + $rU + "(a)192.168.10.57"0.57"; route(RELAY); } For online users this will work as you require but may cause an infinite loop between the servers if you try dialling a user which is offline. Try adding SIP Headers and make sure you don't get into infinite loop condition. *Server1:* if(!lookup("location") { xlog("Failed to Find user online in this server, maybe try Second server\n") if(!is_present_hf("X-FROM-SERVER")) { append_hf("X-FROM-SERVER: 192.168.10.57\r\n"); $ru = "sip:" + $rU + "(a)192.168.15.30"5.30"; route(RELAY); } } *Server2:* if(!lookup("location") { xlog("Failed to Find user online in this server, maybe try First server\n") if(!is_present_hf("X-FROM-SERVER")) { append_hf("X-FROM-SERVER: 192.168.15.30\r\n"); $ru = "sip:" + $rU + "(a)192.168.10.57"0.57"; route(RELAY); } } I hope you understand the logic. Pretty easy isn't it ? Regards, Sammy On Sat, Mar 5, 2016 at 4:45 AM, Raihan Satya <raihanteknologi(a)gmail.com> wrote: