Hi, I have see that Freeswitch sends many "487 Sessuin Ternubatedd-" just after the call is disconnected by the caller. Are all these "487 Session Terminated" or none? To me it seems to be a retransmission, but why happens? Freeswitch waits a response to the 200 OK ? Stephen No. Time Source Destination Protocol Info 1 0.000000 IP-Client IP-Freeswitch SIP/SDP Request: INVITE sip:xxxxxxxxxx@IP-Freeswitch;user=phone, with session description 2 0.000505 IP-Freeswitch IP-Client SIP Status: 100 Trying 3 5.760819 IP-Freeswitch IP-Client SIP/SDP Status: 183 Session Progress, with session description 4 14.250804 IP-Freeswitch IP-Client SIP/SDP Status: 200 OK, with session description 5 14.264365 IP-Client IP-Freeswitch SIP Request: ACK sip:xxxxxxxxxx@IP-Freeswitch:5060 8 194.265481 IP-Client IP-Freeswitch SIP Request: BYE sip:xxxxxxxxxx@IP-Freeswitch:5060 9 194.266483 IP-Freeswitch IP-Client SIP Status: 200 OK 10 194.266538 IP-Freeswitch IP-Client SIP Status: 487 Session Terminated 11 194.766725 IP-Freeswitch IP-Client SIP Status: 487 Session Terminated 12 195.766983 IP-Freeswitch IP-Client SIP Status: 487 Session Terminated 13 197.766163 IP-Freeswitch IP-Client SIP Status: 487 Session Terminated 14 201.766806 IP-Freeswitch IP-Client SIP Status: 487 Session Terminated 15 205.766738 IP-Freeswitch IP-Client SIP Status: 487 Session Terminated 16 209.766724 IP-Freeswitch IP-Client SIP Status: 487 Session Terminated 17 213.766809 IP-Freeswitch IP-Client SIP Status: 487 Session Terminated 18 217.767843 IP-Freeswitch IP-Client SIP Status: 487 Session Terminated 19 221.767900 IP-Freeswitch IP-Client SIP Status: 487 Session Terminated 20 225.767845 IP-Freeswitch IP-Client SIP Status: 487 Session Terminated