Hello! sorry for taking so long to give a feedback to this, but thanks to a fibercut I wasn't able to reach my ss7 test system yesterday. :( I made the changes suggested and changed the one line in chan_ss7.c to isup_send_rel(pvt, pvt->hangupcause); But my asterisk still crashed for a lot of simultaneous outgoing calls. gdb backtrace says: #0 0x408622ac in t9_start (chan=0x0) at chan_ss7.c:903 #1 0x4086664f in process_acm (pvt=0x817d7f0, inmsg=0xbd1ffa34) at chan_ss7.c:2337 #2 0x40865e5c in process_circuit_message (slink=0x40889600, inmsg=0xbd1ffa34, handler=0x4086661f <process_acm>) at chan_ss7.c:2156 #3 0x40868931 in process_isup_message (slink=0x40889600, inmsg=0xbd1ffa34) at chan_ss7.c:3087 #4 0x40869180 in monitor_main (data=0x0) at chan_ss7.c:3303 #5 0x40027e51 in pthread_start_thread () from /lib/libpthread.so.0 #6 0x401ef92a in clone () from /lib/libc.so.6 The last words of asterisk were: Mar 22 11:30:48 DEBUG[30288]: chan_ss7.c:3075 process_isup_message: processing ISUP message, typ=ACM, CIC=20 I add a etherealdump of the calls to this mail. In my opinion there is a generyl problem with the handling of the timeouts, but I could be wrong. Regards, Kai -- Kai Militzer WESTEND GmbH | Internet-Business-Provider Technik CISCO Systems Partner - Authorized Reseller L?tticher Stra?e 10 Tel 0241/701333-14 km@xxxxxxxxxxx D-52064 Aachen Fax 0241/911879 -------------- next part -------------- A non-text attachment was scrubbed... Name: t1_timeouts.pcap Type: application/octet-stream Size: 7522 bytes Desc: not available Url : http://lists.digium.com/pipermail/asterisk-ss7/attachments/20060322/c6e852e7/t1_timeouts.obj