Hi, My FS is FreeSWITCH Version 1.2.12+git~20130910T181609Z~f5ba0bb7d4 (git f5ba0bb 2013-09-10 18:16:09Z) I set <param name="max-sessions" value="20"/>, <param name="sessions-per-second" value="10"/> in switch.conf.xml FS carshed very offen like this in messages log: Oct 26 19:10:21 fs kernel: [4592903.781042] freeswitch[29353]: segfault at 0 ip 00007f4e22e0c8cd sp 00007f4e0924e5b0 error 4 in libfreeswitch.so.1.0.0[7f4e22ce4000+229000] Oct 26 23:41:45 fs kernel: [4609190.441226] freeswitch[518]: segfault at 0 ip 00007ff71baf58cd sp 00007ff7068ae5b0 error 4 in libfreeswitch.so.1.0.0[7ff71b9cd000+229000] Oct 28 09:57:58 fs kernel: [89606.041406] freeswitch[23780]: segfault at 0 ip 00007f68651d78cd sp 00007f684ff205b0 error 4 in libfreeswitch.so.1.0.0[7f68650af000+229000] Oct 29 16:55:24 fs kernel: [201076.501294] freeswitch[16422]: segfault at 0 ip 00007f0b68fc48cd sp 00007f0b4f50d5b0 error 4 in libfreeswitch.so.1.0.0[7f0b68e9c000+229000] lots in freeswitch.log: 2013-10-25 15:25:24.651750 [CRIT] switch_core_session.c:2228 Over Session Limit! 20 2013-10-25 15:25:24.651750 [CRIT] mod_sofia.c:4869 Error Creating Session 2013-10-25 18:36:03.311729 [CRIT] switch_core_session.c:2228 Over Session Limit! 20 2013-10-25 18:36:03.311729 [CRIT] mod_sofia.c:4869 Error Creating Session ... 2013-10-30 15:01:46.501223 [CRIT] mod_sofia.c:4869 Error Creating Session 2013-10-30 15:01:46.521224 [CRIT] switch_time.c:1007 Over Session Rate of 10! May this cause the FS crash? I have another FS server with same Hardware and FS version, but <param name="max-sessions" value="2000"/> and no crash issues. Thanks, Ashou Han