Hello, I'm trying to do a sleep in the request route but seems it's not working if (src_ip == $sel(cfg_get.kamalio2.gw) ){ xlog("L_NOTICE","Sleep 5 seconds"); usleep("5000"); } xlog("L_NOTICE","End of sleeping"); Result : Jul 21 11:38:02 proxy2 /usr/sbin/kamailio[31442]: NOTICE: <script>: Sleep 5 seconds Jul 21 11:38:02 proxy2 /usr/sbin/kamailio[31442]: NOTICE: <script>: End of sleeping Breuer Nicolas Network Supervisor Sales Executive BELCENTER sprl/bvba Operations - NCC 7 Boulevard de France, 1420 Braine - L'Alleud Tel +32 2 403 04 61 Fax +32 2 403 04 63 National Contact Center +32 2 403 04 60