Hi everyone, Does someone know why the solution for bug 13115 (https://issues.asterisk.org/bug_view_advanced_page.php?bug_id=13115) was made only for trunk? Having that this bug went solved more than a year ago, it means that all the 1.6.X.X branches have it applied already? Can this be backported to the 1.4 branch? This could be another good reason to upgrade to 1.6.0.16 after I do some good testing... I'm having this issue on asterisk 1.4.22, this is a quick grep for ERROR of the last lines of /var/log/asterisk/messages file: [Sep 23 10:51:45] ERROR[26172] chan_sip.c: We could NOT get the channel lock for SIP/TRUNK_SWITCH4PRI-ad66bcf8! [Sep 23 10:51:45] ERROR[26172] chan_sip.c: SIP transaction failed: 57d7bbb010e5b40105f0fe5b4364420b at 192.168.130.25 [Sep 23 10:51:45] ERROR[26172] chan_sip.c: We could NOT get the channel lock for SIP/TRUNK_SWITCH4PRI-ad66bcf8! [Sep 23 10:51:45] ERROR[26172] chan_sip.c: SIP transaction failed: 57d7bbb010e5b40105f0fe5b4364420b at 192.168.130.25 [Sep 23 10:51:47] ERROR[26172] chan_sip.c: We could NOT get the channel lock for SIP/512-ab3bec38! [Sep 23 10:51:47] ERROR[26172] chan_sip.c: SIP transaction failed: ODc5N2NiNWQxMmJmNjhhMjE2ZjUwYmNhMmZkOGQ0ZjY. [Sep 23 10:51:50] ERROR[26172] chan_sip.c: We could NOT get the channel lock for SIP/TRUNK_SWITCH4PRI-09c5a400! [Sep 23 10:51:50] ERROR[26172] chan_sip.c: SIP transaction failed: 36959dc8707e78a3660a1bdc22a017c8 at 192.168.130.26 [Sep 23 10:52:48] ERROR[26172] chan_sip.c: We could NOT get the channel lock for SIP/TRUNK_SWITCH4PRI-09d5cae8! [Sep 23 10:52:48] ERROR[26172] chan_sip.c: SIP transaction failed: 595fdb4e33e821df52940e716f1d4e3d at 192.168.130.26 [Sep 23 10:52:48] ERROR[26172] chan_sip.c: We could NOT get the channel lock for SIP/TRUNK_SWITCH4PRI-09d5cae8! [Sep 23 10:52:48] ERROR[26172] chan_sip.c: SIP transaction failed: 595fdb4e33e821df52940e716f1d4e3d at 192.168.130.26 [Sep 23 10:52:50] ERROR[26172] chan_sip.c: We could NOT get the channel lock for SIP/TRUNK_SWITCH4PRI-09d5cae8! [Sep 23 10:52:50] ERROR[26172] chan_sip.c: SIP transaction failed: 595fdb4e33e821df52940e716f1d4e3d at 192.168.130.26 [Sep 23 10:53:01] ERROR[26172] chan_sip.c: We could NOT get the channel lock for SIP/TRUNK_SWITCH4PRI-ad51b0c0! [Sep 23 10:53:01] ERROR[26172] chan_sip.c: SIP transaction failed: 0f90abe5604baaed4e52aff22214342a at 192.168.130.25 [Sep 23 10:53:02] ERROR[26172] chan_sip.c: We could NOT get the channel lock for SIP/TRUNK_SWITCH4PRI-ad51b0c0! [Sep 23 10:53:02] ERROR[26172] chan_sip.c: SIP transaction failed: 0f90abe5604baaed4e52aff22214342a at 192.168.130.25 [Sep 23 10:53:03] ERROR[26172] chan_sip.c: We could NOT get the channel lock for SIP/TRUNK_SWITCH4PRI-ad51b0c0! [Sep 23 10:53:03] ERROR[26172] chan_sip.c: SIP transaction failed: 0f90abe5604baaed4e52aff22214342a at 192.168.130.25 [Sep 23 10:53:04] ERROR[26172] chan_sip.c: We could NOT get the channel lock for SIP/TRUNK_SWITCH4PRI-ad51b0c0! [Sep 23 10:53:04] ERROR[26172] chan_sip.c: SIP transaction failed: 0f90abe5604baaed4e52aff22214342a at 192.168.130.25 [Sep 23 10:53:08] ERROR[26172] chan_sip.c: We could NOT get the channel lock for SIP/TRUNK_SWITCH4PRI-ad51b0c0! [Sep 23 10:53:09] ERROR[26172] chan_sip.c: SIP transaction failed: 0f90abe5604baaed4e52aff22214342a at 192.168.130.25 [Sep 23 10:53:11] ERROR[26172] chan_sip.c: We could NOT get the channel lock for SIP/TRUNK_SWITCH4PRI-ab3c2bb0! [Sep 23 10:53:11] ERROR[26172] chan_sip.c: SIP transaction failed: 5a950b092204a55a686b4e1b0c0a4036 at 192.168.130.25 [Sep 23 10:55:48] ERROR[26172] chan_sip.c: We could NOT get the channel lock for SIP/TRUNK_SWITCH4PRI-ad56a9a0! [Sep 23 10:55:48] ERROR[26172] chan_sip.c: SIP transaction failed: 3779df8e48834898534a09c576389254 at 192.168.130.25 [Sep 23 10:55:50] ERROR[26172] chan_sip.c: We could NOT get the channel lock for SIP/TRUNK_SWITCH4PRI-ad606448! [Sep 23 10:55:50] ERROR[26172] chan_sip.c: SIP transaction failed: 0fd7662648a103195b9d01a047e7e62a at 192.168.130.25 [Sep 23 10:55:53] ERROR[26172] chan_sip.c: We could NOT get the channel lock for SIP/TRUNK_SWITCH4PRI-ad56a9a0! [Sep 23 10:55:53] ERROR[26172] chan_sip.c: SIP transaction failed: 3779df8e48834898534a09c576389254 at 192.168.130.25 [Sep 23 10:55:54] ERROR[26172] chan_sip.c: We could NOT get the channel lock for SIP/TRUNK_SWITCH4PRI-ad56a9a0! [Sep 23 10:55:54] ERROR[26172] chan_sip.c: SIP transaction failed: 3779df8e48834898534a09c576389254 at 192.168.130.25 [Sep 23 10:56:01] ERROR[26172] chan_sip.c: We could NOT get the channel lock for SIP/TRUNK_SWITCH4PRI-ad56a9a0! [Sep 23 10:56:01] ERROR[26172] chan_sip.c: SIP transaction failed: 3779df8e48834898534a09c576389254 at 192.168.130.25 [Sep 23 10:58:32] ERROR[26172] chan_sip.c: We could NOT get the channel lock for SIP/200-ad136a78! [Sep 23 10:58:32] ERROR[26172] chan_sip.c: SIP transaction failed: NWExZjI5NDM2ZjQ4N2U5OGMzM2VmZGNiYjk5MzQyMGI. On the time where the error appeared, the CPU consumption of the asterisk was sky high and were in trouble because of choppy calls. Memory usage of the asterisk process tends to increase a lot too when this situation occurs every 7-10 days... Thanks for any pointers or help. Cheers, -- Ing. Miguel Molina Grupo de Tecnolog?a Millenium Phone Center