Hi All, When we are using the kamailio to handle around 70 INVITE's per second, kamailio is sending 100 Trying with the delay of around 3-4sec for few INVITE's. How can I reduce the delay in 100 Trying? Also, I tried increasing the number of threads for SIP routing processes. This doesnt seem to help. Also tried "modparam("tm", "auto_inv_100", 0)" . This is not working. Please help. Thank you, Vivek.