Hi, I have sometimes strange warning in module ftmod_sangoma_isdn .... 2011-02-20 11:31:35.190942 [WARNING] ftmod_wanpipe.c:946 [s1c31][1:16] Failed to read from sangoma device: No buffer space available (-65) 2011-02-20 11:31:35.190942 [WARNING] ftdm_io.c:3756 [s1c31][1:16] raw I/O read filed 2011-02-20 11:31:35.190942 [WARNING] ftmod_sangoma_isdn.c:386 [s1c31][1:16] Failed to read from channel 2011-02-20 11:31:36.002943 [WARNING] ftmod_wanpipe.c:946 [s1c31][1:16] Failed to read from sangoma device: No buffer space available (-65) 2011-02-20 11:31:36.002943 [WARNING] ftdm_io.c:3756 [s1c31][1:16] raw I/O read filed 2011-02-20 11:31:36.002943 [WARNING] ftmod_sangoma_isdn.c:386 [s1c31][1:16] Failed to read from channel 2011-02-20 11:31:36.390942 [WARNING] ftmod_wanpipe.c:946 [s1c31][1:16] Failed to read from sangoma device: No buffer space available (-65) 2011-02-20 11:31:36.390942 [WARNING] ftdm_io.c:3756 [s1c31][1:16] raw I/O read filed 2011-02-20 11:31:36.390942 [WARNING] ftmod_sangoma_isdn.c:386 [s1c31][1:16] Failed to read from channel 2011-02-20 11:31:36.998941 [INFO] ftmod_sangoma_isdn_stack_rcv.c:688 [SNGISDN Q921] wp1: Protocol: T200 expired N200 times(15): T200 Timeout(260) 2011-02-20 11:31:36.998941 [INFO] ftmod_sangoma_isdn_stack_rcv.c:688 [SNGISDN Q921] wp1: Protocol: SABME reset started(17): SABME tx to initate link reset(264) 2011-02-20 11:31:37.002947 [WARNING] ftmod_wanpipe.c:946 [s1c31][1:16] Failed to read from sangoma device: No buffer space available (-65) 2011-02-20 11:31:37.002947 [WARNING] ftdm_io.c:3756 [s1c31][1:16] raw I/O read filed 2011-02-20 11:31:37.002947 [WARNING] ftmod_sangoma_isdn.c:386 [s1c31][1:16] Failed to read from channel 2011-02-20 11:31:38.002947 [WARNING] ftmod_wanpipe.c:946 [s1c31][1:16] Failed to read from sangoma device: No buffer space available (-65) 2011-02-20 11:31:38.002947 [WARNING] ftdm_io.c:3756 [s1c31][1:16] raw I/O read filed 2011-02-20 11:31:38.002947 [WARNING] ftmod_sangoma_isdn.c:386 [s1c31][1:16] Failed to read from channel 2011-02-20 11:31:39.002947 [WARNING] ftmod_wanpipe.c:946 [s1c31][1:16] Failed to read from sangoma device: No buffer space available (-65) 2011-02-20 11:31:39.002947 [WARNING] ftdm_io.c:3756 [s1c31][1:16] raw I/O read filed 2011-02-20 11:31:39.002947 [WARNING] ftmod_sangoma_isdn.c:386 [s1c31][1:16] Failed to read from channel 2011-02-20 11:31:40.002947 [WARNING] ftmod_wanpipe.c:946 [s1c31][1:16] Failed to read from sangoma device: No buffer space available (-65) 2011-02-20 11:31:40.002947 [WARNING] ftdm_io.c:3756 [s1c31][1:16] raw I/O read filed 2011-02-20 11:31:40.002947 [WARNING] ftmod_sangoma_isdn.c:386 [s1c31][1:16] Failed to read from channel 2011-02-20 11:31:40.998941 [INFO] ftmod_sangoma_isdn_stack_rcv.c:688 [SNGISDN Q921] wp1: Protocol: T200 expired N200 times(15): T200 Timeout(260) 2011-02-20 11:31:40.998941 [INFO] ftmod_sangoma_isdn_stack_rcv.c:688 [SNGISDN Q921] wp1: Protocol: Data Link connection DN(4): Disconnect initiated(263) .... this series of warning appearances almost every half hour, sometimes as single warning. this is'nt related to any monitoring params in system (for example 'vmstat 1' shows nothing special in logs just before i get this warning message, during and a bit after, for warning above vmstat shows (i added time stamp to the end every each rows): procs -----------memory---------- ---swap-- -----io---- -system-- ----cpu---- r b swpd free buff cache si so bi bo in cs us sy id wa 0 0 0 4631820 167932 1087348 0 0 0 0 100 2697 0 0 100 0 02-20-2011 11:31:30 0 0 0 4631944 167932 1087348 0 0 0 0 100 2693 0 0 100 0 02-20-2011 11:31:31 0 0 0 4631820 167932 1087348 0 0 0 0 100 2687 0 0 100 0 02-20-2011 11:31:32 0 0 0 4631944 167932 1087348 0 0 0 72 121 2711 0 0 100 0 02-20-2011 11:31:33 0 0 0 4631944 167932 1087348 0 0 0 0 104 2713 0 0 100 0 02-20-2011 11:31:34 0 0 0 4631944 167932 1087352 0 0 0 0 104 2703 0 0 100 0 02-20-2011 11:31:35 0 0 0 4631944 167932 1087352 0 0 0 0 104 2716 0 0 100 0 02-20-2011 11:31:36 0 0 0 4631944 167932 1087352 0 0 0 152 137 2773 0 0 100 0 02-20-2011 11:31:37 0 0 0 4631944 167932 1087356 0 0 0 0 107 2708 0 0 100 0 02-20-2011 11:31:38 0 0 0 4631820 167932 1087356 0 0 0 0 104 2700 0 0 100 0 02-20-2011 11:31:39 0 0 0 4631820 167932 1087360 0 0 0 0 104 2701 0 0 100 0 02-20-2011 11:31:40 0 0 0 4631820 167932 1087360 0 0 0 0 104 2719 0 0 100 0 02-20-2011 11:31:41 0 0 0 4631820 167932 1087360 0 0 0 156 124 2736 0 0 100 0 02-20-2011 11:31:42 0 0 0 4631696 167932 1087360 0 0 0 8 109 2697 0 0 100 0 02-20-2011 11:31:43 0 0 0 4631696 167932 1087360 0 0 0 0 103 2695 0 0 100 0 02-20-2011 11:31:44 0 0 0 4631696 167932 1087360 0 0 0 0 101 2684 0 0 100 0 02-20-2011 11:31:45 When i've tested system i can make outgoing and incoming calls without any problem (max 3 calls simultaneously with different configuration, but i'm affraid if i use this in production environment (about 30-50 calls via isdn) this warning may cause addiction problems. I have installed: freeswitch : FreeSWITCH Version 1.0.head (git-a3b18e5 2011-02-19 16-47-19 +0100) linux (Debian) : Linux PBX 2.6.26-2-amd64 #1 SMP Thu Sep 16 15:56:38 UTC 2010 x86_64 GNU/Linux wanrouter: WANPIPE Release: 3.5.18 libsng_isdn : libsng_isdn-7.3.0.x86_64 sangoma card: A102DE Is anybody have the same warning ? Thanks