kamailio.cfg: added some tm parameters

- failure_reply_mode set to 3 - kamailio 1.5.x default behavior
- added fr_timer and fr_inv_timer with their default values to show they
  take now milisecond values

etc/kamailio.cfg

@@ -178,6 +178,14 @@ loadmodule "nathelper.so"
 modparam("mi_fifo", "fifo_name", "/tmp/kamailio_fifo")
 
 
+# ----- tm params -----
+# auto-discard branches from previous serial forking leg
+modparam("tm", "failure_reply_mode", 3)
+# default retransmission timeout: 30sec
+modparam("tm", "fr_timer", 30000)
+# default invite retransmission timeout after 1xx: 120sec
+modparam("tm", "fr_inv_timer", 120000)
+
 # ----- rr params -----
 # add value to ;lr param to cope with most of the UAs
 modparam("rr", "enable_full_lr", 1)