Hello, Tested on 4 different servers with Asterisk 1.4.20.1 and Realtime (MySQL). When trying to register SIP device Asterisk CLI shows: [Jun 3 10:26:10] NOTICE[13451]: chan_sip.c:12665 handle_response_peerpoke: Peer '101' is now Reachable. (152ms / 2000ms) [Jun 3 10:26:10] NOTICE[13451]: chan_sip.c:12665 handle_response_peerpoke: Peer '101' is now Reachable. (154ms / 2000ms) [Jun 3 10:26:10] NOTICE[13451]: chan_sip.c:12665 handle_response_peerpoke: Peer '101' is now Reachable. (157ms / 2000ms) [Jun 3 10:26:10] NOTICE[13451]: chan_sip.c:12665 handle_response_peerpoke: Peer '101' is now Reachable. (162ms / 2000ms) [Jun 3 10:26:10] NOTICE[13451]: chan_sip.c:12665 handle_response_peerpoke: Peer '101' is now Reachable. (151ms / 2000ms) [Jun 3 10:26:10] NOTICE[13451]: chan_sip.c:12665 handle_response_peerpoke: Peer '101' is now Reachable. (155ms / 2000ms) [Jun 3 10:26:10] NOTICE[13451]: chan_sip.c:12665 handle_response_peerpoke: Peer '101' is now Reachable. (159ms / 2000ms) [Jun 3 10:26:10] NOTICE[13451]: chan_sip.c:12665 handle_response_peerpoke: Peer '101' is now Reachable. (156ms / 2000ms) [Jun 3 10:26:10] NOTICE[13451]: chan_sip.c:12665 handle_response_peerpoke: Peer '101' is now Reachable. (152ms / 2000ms) [Jun 3 10:26:10] NOTICE[13451]: chan_sip.c:12665 handle_response_peerpoke: Peer '101' is now Reachable. (152ms / 2000ms) [Jun 3 10:26:10] NOTICE[13451]: chan_sip.c:12665 handle_response_peerpoke: Peer '101' is now Reachable. (156ms / 2000ms) [Jun 3 10:26:11] NOTICE[13451]: chan_sip.c:12665 handle_response_peerpoke: Peer '101' is now Reachable. (165ms / 2000ms) [Jun 3 10:26:11] NOTICE[13451]: chan_sip.c:12665 handle_response_peerpoke: Peer '101' is now Reachable. (152ms / 2000ms) [Jun 3 10:26:11] NOTICE[13451]: chan_sip.c:12665 handle_response_peerpoke: Peer '101' is now Reachable. (153ms / 2000ms) On other server: [Jun 2 22:30:20] NOTICE[6421] chan_sip.c: Peer 'RofiqC3' is now UNREACHABLE! Last qualify: 0 [Jun 2 22:30:20] NOTICE[6421] chan_sip.c: Peer 'RofiqC4' is now UNREACHABLE! Last qualify: 0 [Jun 2 22:30:20] NOTICE[6421] chan_sip.c: Peer 'RofiqC3' is now UNREACHABLE! Last qualify: 0 [Jun 2 22:30:20] NOTICE[6421] chan_sip.c: Peer 'RofiqC3' is now UNREACHABLE! Last qualify: 0 [Jun 2 22:30:20] NOTICE[6421] chan_sip.c: Peer 'RofiqC3' is now UNREACHABLE! Last qualify: 0 [Jun 2 22:30:20] NOTICE[6421] chan_sip.c: Peer 'RofiqC3' is now UNREACHABLE! Last qualify: 0 [Jun 2 22:30:20] NOTICE[6421] chan_sip.c: Peer 'RofiqC3' is now UNREACHABLE! Last qualify: 0 [Jun 2 22:30:20] NOTICE[6421] chan_sip.c: Peer 'RofiqC3' is now UNREACHABLE! Last qualify: 0 [Jun 2 22:30:20] NOTICE[6421] chan_sip.c: Peer 'RofiqC3' is now UNREACHABLE! Last qualify: 0 [Jun 2 22:30:20] NOTICE[6421] chan_sip.c: Peer 'RofiqC3' is now UNREACHABLE! Last qualify: 0 [Jun 2 22:30:20] NOTICE[6421] chan_sip.c: Peer 'RofiqC3' is now UNREACHABLE! Last qualify: 0 [Jun 2 22:30:20] NOTICE[6421] chan_sip.c: Peer 'RofiqC4' is now UNREACHABLE! Last qualify: 0 On third: [Jun 2 14:13:56] NOTICE[20174] chan_sip.c: Peer 'theboss' is now UNREACHABLE! Last qualify: 0 [Jun 2 14:13:56] NOTICE[20174] chan_sip.c: Peer 'theboss' is now UNREACHABLE! Last qualify: 0 [Jun 2 14:13:56] NOTICE[20174] chan_sip.c: Peer 'theboss' is now UNREACHABLE! Last qualify: 0 [Jun 2 14:13:56] NOTICE[20174] chan_sip.c: Peer 'theboss' is now UNREACHABLE! Last qualify: 0 [Jun 2 14:13:56] NOTICE[20174] chan_sip.c: Peer 'theboss' is now UNREACHABLE! Last qualify: 0 [Jun 2 14:13:56] NOTICE[20174] chan_sip.c: Peer 'theboss' is now UNREACHABLE! Last qualify: 0 [Jun 2 14:13:56] NOTICE[20174] chan_sip.c: Peer 'theboss' is now UNREACHABLE! Last qualify: 0 [Jun 2 14:13:56] NOTICE[20174] chan_sip.c: Peer 'theboss' is now UNREACHABLE! Last qualify: 0 [Jun 2 14:13:56] NOTICE[20174] chan_sip.c: Peer 'theboss' is now UNREACHABLE! Last qualify: 0 [Jun 2 14:13:56] NOTICE[20174] chan_sip.c: Peer 'theboss' is now UNREACHABLE! Last qualify: 0 [Jun 2 14:13:56] NOTICE[20174] chan_sip.c: Peer 'theboss' is now UNREACHABLE! Last qualify: 0 And this does not stop even when device is swithed off. Device shows: "service unavailable , not registered" Asterisk hangs and /etc/init.d/asterisk stop does not help. killall -9 safe_asterisk/asterisk is the only way. Downgrading to Asterisk 1.4.18.1 (1.4.19.x is broken) helps and everything works very nicely. Anybody else experience this? Regards, Mindaugas Kezys http://www.kolmisoft.com