Hi, I have an IBM server running latest asterisk 1.4.x connected to a Siemens hi-path user a TE120P single-span. Approx every 8 hours (although not every 8 hours and sometimes 2 in a row) at exactly the same time I see the following errors Does anyone have any suggestions / ideas ? Thanks Ruairi Sep 24 11:56:30 asterisk01 -- MARK -- Sep 24 11:59:02 asterisk01 ntpd[3615]: synchronized to 172.16.22.60, stratum 4 Sep 24 11:59:28 asterisk01 kernel: wcte12xp: NMF workaround on! Sep 24 11:59:28 asterisk01 kernel: wcte12xp: Setting yellow alarm Sep 24 11:59:29 asterisk01 kernel: wcte12xp: NMF workaround off! Sep 24 11:59:34 asterisk01 kernel: wcte12xp: Clearing yellow alarm Sep 24 12:16:30 asterisk01 -- MARK -- Sep 24 12:17:01 asterisk01 /USR/SBIN/CRON[8325]: (root) CMD ( cd / && run-parts --report /etc/cron.hourly) Sep 24 12:36:31 asterisk01 -- MARK -- Sep 24 12:56:31 asterisk01 -- MARK -- Sep 24 12:59:28 asterisk01 kernel: wcte12xp: NMF workaround on! Sep 24 12:59:28 asterisk01 kernel: wcte12xp: Setting yellow alarm Sep 24 12:59:28 asterisk01 kernel: wcte12xp: NMF workaround off! Sep 24 12:59:33 asterisk01 kernel: wcte12xp: Clearing yellow alarm Sep 24 13:16:31 asterisk01 -- MARK -- The siemens see a F5413 Spur error... A more detailed asterisk log shows [Sep 24 12:59:28] WARNING[6374] chan_zap.c: Detected alarm on channel 2: Red Alarm [Sep 24 12:59:28] WARNING[6374] chan_zap.c: Unable to disable echo cancellation on channel 2 [Sep 24 12:59:28] WARNING[6374] chan_zap.c: Detected alarm on channel 3: Red Alarm [Sep 24 12:59:28] WARNING[6374] chan_zap.c: Unable to disable echo cancellation on channel 3 [Sep 24 12:59:28] WARNING[6374] chan_zap.c: Detected alarm on channel 4: Red Alarm [Sep 24 12:59:28] WARNING[6374] chan_zap.c: Unable to disable echo cancellation on channel 4 [Sep 24 12:59:28] WARNING[6374] chan_zap.c: Detected alarm on channel 5: Red Alarm [Sep 24 12:59:28] WARNING[6374] chan_zap.c: Unable to disable echo cancellation on channel 5 [Sep 24 12:59:28] WARNING[6374] chan_zap.c: Detected alarm on channel 6: Red Alarm [Sep 24 12:59:28] WARNING[6374] chan_zap.c: Unable to disable echo cancellation on channel 6 [Sep 24 12:59:28] WARNING[6374] chan_zap.c: Detected alarm on channel 7: Red Alarm [Sep 24 12:59:28] WARNING[6374] chan_zap.c: Unable to disable echo cancellation on channel 7 [Sep 24 12:59:28] WARNING[6374] chan_zap.c: Detected alarm on channel 8: Red Alarm [Sep 24 12:59:28] WARNING[6374] chan_zap.c: Unable to disable echo cancellation on channel 8 [Sep 24 12:59:28] WARNING[6374] chan_zap.c: Detected alarm on channel 9: Red Alarm [Sep 24 12:59:28] WARNING[6374] chan_zap.c: Unable to disable echo cancellation on channel 9 [Sep 24 12:59:28] WARNING[6374] chan_zap.c: Detected alarm on channel 10: Red Alarm [Sep 24 12:59:28] WARNING[6374] chan_zap.c: Unable to disable echo cancellation on channel 10 [Sep 24 12:59:28] WARNING[6374] chan_zap.c: Detected alarm on channel 11: Red Alarm [Sep 24 12:59:28] WARNING[6374] chan_zap.c: Unable to disable echo cancellation on channel 11 [Sep 24 12:59:28] WARNING[6374] chan_zap.c: Detected alarm on channel 12: Red Alarm [Sep 24 12:59:28] WARNING[6374] chan_zap.c: Unable to disable echo cancellation on channel 12 [Sep 24 12:59:28] WARNING[6374] chan_zap.c: Detected alarm on channel 13: Red Alarm [Sep 24 12:59:28] WARNING[6374] chan_zap.c: Unable to disable echo cancellation on channel 13 [Sep 24 12:59:28] WARNING[6374] chan_zap.c: Detected alarm on channel 14: Red Alarm [Sep 24 12:59:28] WARNING[6374] chan_zap.c: Unable to disable echo cancellation on channel 14 [Sep 24 12:59:28] WARNING[6374] chan_zap.c: Detected alarm on channel 15: Red Alarm [Sep 24 12:59:28] WARNING[6374] chan_zap.c: Unable to disable echo cancellation on channel 15 [Sep 24 12:59:28] WARNING[6374] chan_zap.c: Detected alarm on channel 17: Red Alarm [Sep 24 12:59:28] WARNING[6374] chan_zap.c: Unable to disable echo cancellation on channel 17 [Sep 24 12:59:28] WARNING[6374] chan_zap.c: Detected alarm on channel 18: Red Alarm [Sep 24 12:59:28] WARNING[6374] chan_zap.c: Unable to disable echo cancellation on channel 18 [Sep 24 12:59:28] WARNING[6374] chan_zap.c: Detected alarm on channel 19: Red Alarm [Sep 24 12:59:28] WARNING[6374] chan_zap.c: Unable to disable echo cancellation on channel 19 [Sep 24 12:59:28] WARNING[6374] chan_zap.c: Detected alarm on channel 20: Red Alarm [Sep 24 12:59:28] WARNING[6374] chan_zap.c: Unable to disable echo cancellation on channel 20 [Sep 24 12:59:28] WARNING[6374] chan_zap.c: Detected alarm on channel 21: Red Alarm [Sep 24 12:59:28] WARNING[6374] chan_zap.c: Unable to disable echo cancellation on channel 21 [Sep 24 12:59:28] WARNING[6374] chan_zap.c: Detected alarm on channel 22: Red Alarm [Sep 24 12:59:28] WARNING[6374] chan_zap.c: Unable to disable echo cancellation on channel 22 [Sep 24 12:59:28] WARNING[6374] chan_zap.c: Detected alarm on channel 23: Red Alarm [Sep 24 12:59:28] WARNING[6374] chan_zap.c: Unable to disable echo cancellation on channel 23 [Sep 24 12:59:28] WARNING[6374] chan_zap.c: Detected alarm on channel 24: Red Alarm [Sep 24 12:59:28] WARNING[6374] chan_zap.c: Unable to disable echo cancellation on channel 24 [Sep 24 12:59:28] WARNING[6374] chan_zap.c: Detected alarm on channel 25: Red Alarm [Sep 24 12:59:28] WARNING[6374] chan_zap.c: Unable to disable echo cancellation on channel 25 [Sep 24 12:59:28] WARNING[6374] chan_zap.c: Detected alarm on channel 26: Red Alarm [Sep 24 12:59:28] WARNING[6374] chan_zap.c: Unable to disable echo cancellation on channel 26 [Sep 24 12:59:28] ERROR[8342] chan_zap.c: Write to 39 failed: Unknown error 500 [Sep 24 12:59:28] WARNING[6374] chan_zap.c: Detected alarm on channel 27: Red Alarm [Sep 24 12:59:28] ERROR[8342] chan_zap.c: Short write: 0/15 (Unknown error 500) [Sep 24 12:59:28] WARNING[6374] chan_zap.c: Unable to disable echo cancellation on channel 27 [Sep 24 12:59:28] WARNING[8342] chan_zap.c: Detected alarm on channel 1: Red Alarm [Sep 24 12:59:28] WARNING[6374] chan_zap.c: Detected alarm on channel 28: Red Alarm [Sep 24 12:59:28] WARNING[6374] chan_zap.c: Unable to disable echo cancellation on channel 28 [Sep 24 12:59:28] NOTICE[6373] chan_zap.c: PRI got event: Alarm (4) on Primary D-channel of span 1 [Sep 24 12:59:28] WARNING[6373] chan_zap.c: No D-channels available! Using Primary channel 16 as D-channel anyway! [Sep 24 12:59:28] WARNING[6374] chan_zap.c: Detected alarm on channel 29: Red Alarm [Sep 24 12:59:28] WARNING[6374] chan_zap.c: Unable to disable echo cancellation on channel 29 [Sep 24 12:59:28] WARNING[6374] chan_zap.c: Detected alarm on channel 30: Red Alarm [Sep 24 12:59:28] WARNING[6374] chan_zap.c: Unable to disable echo cancellation on channel 30 [Sep 24 12:59:28] WARNING[6374] chan_zap.c: Detected alarm on channel 31: Red Alarm [Sep 24 12:59:28] WARNING[6374] chan_zap.c: Unable to disable echo cancellation on channel 31 [Sep 24 12:59:33] NOTICE[6378] chan_iax2.c: Restricting registration for peer 'iaxmodem' to 60 seconds (requested 300) [Sep 24 12:59:33] NOTICE[6374] chan_zap.c: Alarm cleared on channel 1 [Sep 24 12:59:33] NOTICE[6374] chan_zap.c: Alarm cleared on channel 2 [Sep 24 12:59:33] NOTICE[6374] chan_zap.c: Alarm cleared on channel 3 [Sep 24 12:59:33] NOTICE[6374] chan_zap.c: Alarm cleared on channel 4 [Sep 24 12:59:33] NOTICE[6374] chan_zap.c: Alarm cleared on channel 5 [Sep 24 12:59:33] NOTICE[6374] chan_zap.c: Alarm cleared on channel 6 [Sep 24 12:59:33] NOTICE[6374] chan_zap.c: Alarm cleared on channel 7 [Sep 24 12:59:33] NOTICE[6374] chan_zap.c: Alarm cleared on channel 8 [Sep 24 12:59:33] NOTICE[6374] chan_zap.c: Alarm cleared on channel 9 [Sep 24 12:59:33] NOTICE[6374] chan_zap.c: Alarm cleared on channel 10 [Sep 24 12:59:33] NOTICE[6374] chan_zap.c: Alarm cleared on channel 11 [Sep 24 12:59:33] NOTICE[6374] chan_zap.c: Alarm cleared on channel 12 [Sep 24 12:59:33] NOTICE[6374] chan_zap.c: Alarm cleared on channel 13 [Sep 24 12:59:33] NOTICE[6374] chan_zap.c: Alarm cleared on channel 14 [Sep 24 12:59:33] NOTICE[6374] chan_zap.c: Alarm cleared on channel 15 [Sep 24 12:59:33] NOTICE[6374] chan_zap.c: Alarm cleared on channel 17 [Sep 24 12:59:33] NOTICE[6374] chan_zap.c: Alarm cleared on channel 18 [Sep 24 12:59:33] NOTICE[6374] chan_zap.c: Alarm cleared on channel 19 [Sep 24 12:59:33] NOTICE[6374] chan_zap.c: Alarm cleared on channel 20 [Sep 24 12:59:33] NOTICE[6374] chan_zap.c: Alarm cleared on channel 21 [Sep 24 12:59:33] NOTICE[6374] chan_zap.c: Alarm cleared on channel 22 [Sep 24 12:59:33] NOTICE[6374] chan_zap.c: Alarm cleared on channel 23 [Sep 24 12:59:33] NOTICE[6374] chan_zap.c: Alarm cleared on channel 24 [Sep 24 12:59:33] NOTICE[6374] chan_zap.c: Alarm cleared on channel 25 [Sep 24 12:59:33] NOTICE[6374] chan_zap.c: Alarm cleared on channel 26 [Sep 24 12:59:33] NOTICE[6374] chan_zap.c: Alarm cleared on channel 27 [Sep 24 12:59:33] NOTICE[6374] chan_zap.c: Alarm cleared on channel 28 [Sep 24 12:59:33] NOTICE[6374] chan_zap.c: Alarm cleared on channel 29 [Sep 24 12:59:33] NOTICE[6374] chan_zap.c: Alarm cleared on channel 30 [Sep 24 12:59:33] NOTICE[6374] chan_zap.c: Alarm cleared on channel 31 [Sep 24 12:59:33] NOTICE[6373] chan_zap.c: PRI got event: No more alarm (5) on Primary D-channel of span 1