Hello, I'm trying to place a call between two SIPp instances over FreeSWITCH. Before the connection is set up completeley FS sends a BYE to the caller. In the logs is see the hangup cause is "UNALLOCATED". That happens only if there is a pause after sending the ACK. Hangup sofia/freeswitch.mocon.esk.fraunhofer.de/bob@freeswitch.mocon.esk.fraunhofer .de:5060 [CS_EXECUTE] [UNALLOCATED] 2008-04-17 14:53:46 [DEBUG] switch_channel.c:1293 switch_channel_perform_hangup() Kill sofia/freeswitch.mocon.esk.fraunhofer.de/bob@freeswitch.mocon.esk.fraunhofer .de:5060 [KILL] 2008-04-17 14:53:46 [DEBUG] switch_core_session.c:619 switch_core_session_signal_state_change() Kill sofia/freeswitch.mocon.esk.fraunhofer.de/bob@freeswitch.mocon.esk.fraunhofer .de:5060 [BREAK] 2008-04-17 14:53:46 [DEBUG] switch_core_state_machine.c:405 switch_core_session_run() sofia/freeswitch.mocon.esk.fraunhofer.de/bob@freeswitch.mocon.esk.fraunhofer .de:5060 Running State Change CS_HANGUP 2008-04-17 14:53:46 [DEBUG] switch_core_state_machine.c:431 switch_core_session_run() (sofia/freeswitch.mocon.esk.fraunhofer.de/bob@freeswitch.mocon.esk.fraunhofe r.de:5060) Calling Handler for State HANGUP 2008-04-17 14:53:46 [DEBUG] mod_sofia.c:258 sofia_on_hangup() Channel sofia/freeswitch.mocon.esk.fraunhofer.de/bob@freeswitch.mocon.esk.fraunhofer .de:5060 hanging up, cause: UNALLOCATED If I the call is placed by a softphone the same behavoir occurs. What does that mean? Is it a bug in FS? Thanks in advance! Alois Komenda Fraunhofer-Einrichtung für Systeme der Kommunikationstechnik ESK