virtual iax2.nacs.net {
     active = 1
     address = 207.166.192.184 eth0:3
     port = 4569
     persistent = 3600
     pmask = 255.255.255.255
     send = "*"
     expect = "OK"
     send_program = "/usr/local/bin/iax_check %h"
     load_monitor = none
     scheduler = wlc
     protocol = udp
     timeout = 6
     reentry = 15
     quiesce_server = 1
     server asterisk1.nacs.net {
         address = 207.166.192.188
         active = 1
         weight = 1
     }
     server asterisk2.nacs.net {
         address = 207.166.192.189
         active = 1
         weight = 1
     }