Hi, I had my PRI dropout this afternoon after logging the errors below - Can't seem to find much info on what it might be or what caused it. Whilst waiting for the telco tech to call I took the server down and restarted it and it all came back good,but that may just have been coincidence so I still don't really know if it is my end or theirs. Anyone have any ideas or places I could go to find out what it means? Contents of zaptel.conf are: span=1,1,0,ccs,hdb3,crc4 bchan=1-10 unused=11-15,17-31 dchan=16 Contents of /var/log/asterisk/messages: Oct 26 14:39:38 NOTICE[213005]: PRI got event: 4 on Primary D-channel of span 1 Oct 26 14:39:38 WARNING[213005]: No D-channels available! Using Primary on channel anyway 16! Oct 26 14:39:38 WARNING[229390]: Detected alarm on channel 1: Red Alarm Oct 26 14:39:38 WARNING[229390]: Unable to disable echo cancellation on channel 1 - to channel 10 ... Oct 26 14:39:43 NOTICE[213005]: PRI got event: 5 on Primary D-channel of span 1 Oct 26 14:39:43 WARNING[213005]: No D-channels available! Using Primary on channel anyway 16! Oct 26 14:39:43 NOTICE[229390]: Alarm cleared on channel 1 - to channel 10 ... Oct 26 14:43:03 WARNING[4964373]: PRI: Short write: -1/15 (Unknown error 500) Oct 26 14:43:03 WARNING[4964373]: Detected alarm on channel 1: Red Alarm Oct 26 14:43:03 WARNING[229390]: Detected alarm on channel 2: Red Alarm Oct 26 14:43:03 WARNING[229390]: Unable to disable echo cancellation on channel 2 - to channel 10 ... Oct 26 14:43:03 NOTICE[213005]: PRI got event: 4 on Primary D-channel of span 1 Oct 26 14:43:03 WARNING[213005]: No D-channels available! Using Primary on channel anyway 16! Oct 26 14:43:06 WARNING[213005]: No D-channels available! Using Primary on channel anyway 16!