UA 32 users abnormal reset

[Xero]

Hi all,

My customer is using : R5.1.2-e2.504-1-v-pk-c6s2, i got so many incidents listed below about terminal loss and the digital extensions on the two UA cards resetted numerous times, hard resetting the card has solved the issue but i want to know the cause of these incidents:

2/10 23:28:09 000001M|00/24/-/---|=4:3754=UA link no longer responding
10/12/10 23:28:09 000001M|00/24/-/---|=4:3754=UA link no longer responding
10/12/10 23:28:09 000001M|00/24/0/015|=3:2050=UA Terminal 15 Loss
10/12/10 23:28:21 000001M|00/24/0/014|=5:2053=Terminal 14 in service
10/12/10 23:28:21 000001M|00/24/0/015|=5:2053=Terminal 15 in service
10/12/10 23:29:42 000001M|00/24/0/015|=3:2050=UA Terminal 15 Loss
10/12/10 23:29:42 000001M|00/24/-/---|=4:3754=UA link no longer responding
10/12/10 23:29:42 000001M|00/24/0/014|=3:2050=UA Terminal 14 Loss
10/12/10 23:29:42 000001M|00/24/-/---|=4:3754=UA link no longer responding
10/12/10 23:29:54 000001M|00/24/0/014|=5:2053=Terminal 14 in service
10/12/10 23:29:54 000001M|00/24/0/015|=5:2053=Terminal 15 in service
10/12/10 23:30:30 000001M|00/24/0/014|=5:2053=Terminal 14 in service
10/12/10 23:30:30 000001M|00/24/0/015|=5:2053=Terminal 15 in service
10/12/10 23:32:22 000001M|00/24/0/015|=3:2050=UA Terminal 15 Loss
10/12/10 23:32:22 000001M|00/24/-/---|=4:3754=UA link no longer responding
10/12/10 23:32:22 000001M|00/24/0/014|=3:2050=UA Terminal 14 Loss
10/12/10 23:32:22 000001M|00/24/-/---|=4:3754=UA link no longer responding
10/12/10 23:32:32 000001M|00/24/0/014|=5:2053=Terminal 14 in service
10/12/10 23:32:32 000001M|00/24/0/015|=5:2053=Terminal 15 in service
10/12/10 23:33:34 000001M|00/24/0/014|=3:2050=UA Terminal 14 Loss
10/12/10 23:33:34 000001M|00/24/-/---|=4:3754=UA link no longer responding
10/12/10 23:33:34 000001M|00/24/-/---|=4:3754=UA link no longer responding
10/12/10 23:33:34 000001M|00/24/0/015|=3:2050=UA Terminal 15 Loss
10/12/10 23:33:40 000001M|00/24/0/014|=5:2053=Terminal 14 in service
10/12/10 23:33:40 000001M|00/24/0/015|=5:2053=Terminal 15 in service
10/12/10 23:34:25 000001M|00/24/0/014|=3:2050=UA Terminal 14 Loss
10/12/10 23:34:25 000001M|00/24/-/---|=4:3754=UA link no longer responding
10/12/10 23:34:25 000001M|00/24/-/---|=4:3754=UA link no longer responding
10/12/10 23:34:25 000001M|00/24/0/015|=3:2050=UA Terminal 15 Loss
10/12/10 23:34:33 000001M|00/24/0/014|=5:2053=Terminal 14 in service
10/12/10 23:34:33 000001M|00/24/0/015|=5:2053=Terminal 15 in service
10/12/10 23:37:40 000001M|00/24/0/014|=5:2053=Terminal 14 in service
10/12/10 23:37:40 000001M|00/24/0/015|=5:2053=Terminal 15 in service
10/12/10 23:37:41 000001M|00/24/0/014|=3:2050=UA Terminal 14 Loss
10/12/10 23:37:41 000001M|00/24/-/---|=4:3754=UA link no longer responding
10/12/10 23:37:41 000001M|00/24/0/015|=3:2050=UA Terminal 15 Loss
10/12/10 23:37:41 000001M|00/24/-/---|=4:3754=UA link no longer responding
10/12/10 23:37:51 000001M|00/24/0/014|=5:2053=Terminal 14 in service
10/12/10 23:37:52 000001M|00/24/0/015|=5:2053=Terminal 15 in service
10/12/10 23:39:42 000001M|00/24/0/014|=3:2050=UA Terminal 14 Loss
10/12/10 23:39:42 000001M|00/24/-/---|=4:3754=UA link no longer responding
10/12/10 23:39:55 000001M|00/24/0/014|=5:2053=Terminal 14 in service
10/12/10 23:39:55 000001M|00/24/0/015|=5:2053=Terminal 15 in service
10/12/10 23:43:22 000001M|00/24/0/014|=5:2053=Terminal 14 in service
10/12/10 23:43:22 000001M|00/24/0/015|=5:2053=Terminal 15 in service
10/12/10 23:45:11 000001M|00/24/0/014|=3:2050=UA Terminal 14 Loss
10/12/10 23:45:11 000001M|00/24/-/---|=4:3754=UA link no longer responding
10/12/10 23:45:24 000001M|00/24/0/014|=5:2053=Terminal 14 in service
10/12/10 23:45:24 000001M|00/24/0/015|=5:2053=Terminal 15 in service
10/12/10 23:46:19 000001M|00/24/0/014|=5:2053=Terminal 14 in service
10/12/10 23:46:19 000001M|00/24/0/015|=5:2053=Terminal 15 in service
10/12/10 23:49:00 000001M|00/24/0/015|=3:2050=UA Terminal 15 Loss
10/12/10 23:49:00 000001M|00/24/-/---|=4:3754=UA link no longer responding
10/12/10 23:49:00 000001M|00/24/0/014|=3:2050=UA Terminal 14 Loss
10/12/10 23:49:00 000001M|00/24/-/---|=4:3754=UA link no longer responding
10/12/10 23:49:07 000001M|00/24/0/014|=5:2053=Terminal 14 in service
10/12/10 23:49:07 000001M|00/24/0/015|=5:2053=Terminal 15 in service
10/12/10 23:49:31 000001M|00/24/0/015|=3:2050=UA Terminal 15 Loss
10/12/10 23:49:32 000001M|00/24/-/---|=4:3754=UA link no longer responding
10/12/10 23:49:32 000001M|00/24/0/014|=3:2050=UA Terminal 14 Loss
10/12/10 23:49:32 000001M|00/24/-/---|=4:3754=UA link no longer responding
10/12/10 23:49:43 000001M|00/24/0/014|=5:2053=Terminal 14 in service
10/12/10 23:49:43 000001M|00/24/0/015|=5:2053=Terminal 15 in service
10/12/10 23:51:45 000001M|00/24/0/015|=3:2050=UA Terminal 15 Loss
10/12/10 23:51:45 000001M|00/24/-/---|=4:3754=UA link no longer responding
10/12/10 23:51:45 000001M|00/24/0/014|=3:2050=UA Terminal 14 Loss
10/12/10 23:51:45 000001M|00/24/-/---|=4:3754=UA link no longer responding
10/12/10 23:51:52 000001M|00/24/0/014|=5:2053=Terminal 14 in service
10/12/10 23:51:52 000001M|00/24/0/015|=5:2053=Terminal 15 in service
10/12/10 23:52:18 000001M|00/24/0/014|=5:2053=Terminal 14 in service
10/12/10 23:52:18 000001M|00/24/0/015|=5:2053=Terminal 15 in service
10/12/10 23:54:29 000001M|00/24/0/015|=3:2050=UA Terminal 15 Loss
10/12/10 23:54:29 000001M|00/24/-/---|=4:3754=UA link no longer responding
10/12/10 23:54:29 000001M|00/24/0/014|=3:2050=UA Terminal 14 Loss
10/12/10 23:54:29 000001M|00/24/-/---|=4:3754=UA link no longer responding
10/12/10 23:54:36 000001M|00/24/0/014|=5:2053=Terminal 14 in service
10/12/10 23:54:36 000001M|00/24/0/015|=5:2053=Terminal 15 in service
10/12/10 23:59:11 000001M|00/24/0/015|=3:2050=UA Terminal 15 Loss
10/12/10 23:59:11 000001M|00/24/-/---|=4:3754=UA link no longer responding
10/12/10 23:59:11 000001M|00/24/0/014|=3:2050=UA Terminal 14 Loss
10/12/10 23:59:11 000001M|00/24/-/---|=4:3754=UA link no longer responding
10/12/10 23:59:18 000001M|00/24/0/014|=5:2053=Terminal 14 in service
10/12/10 23:59:18 000001M|00/24/0/015|=5:2053=Terminal 15 in service
11/12/10 00:00:47 000001M|00/24/0/014|=5:2053=Terminal 14 in service
11/12/10 00:00:47 000001M|00/24/0/015|=5:2053=Terminal 15 in service
11/12/10 00:02:19 000001M|00/24/0/014|=5:2053=Terminal 14 in service
11/12/10 00:02:19 000001M|00/24/0/015|=5:2053=Terminal 15 in service
11/12/10 00:05:40 000001M|00/24/0/014|=3:2050=UA Terminal 14 Loss
11/12/10 00:05:40 000001M|00/24/-/---|=4:3754=UA link no longer responding
11/12/10 00:05:40 000001M|00/24/-/---|=4:3754=UA link no longer responding
11/12/10 00:05:40 000001M|00/24/0/015|=3:2050=UA Terminal 15 Loss
11/12/10 00:05:49 000001M|00/24/0/014|=5:2053=Terminal 14 in service
11/12/10 00:05:49 000001M|00/24/0/015|=5:2053=Terminal 15 in service
11/12/10 00:06:52 000001M|00/24/0/014|=3:2050=UA Terminal 14 Loss
11/12/10 00:06:52 000001M|00/24/-/---|=4:3754=UA link no longer responding
11/12/10 00:06:52 000001M|00/24/-/---|=4:3754=UA link no longer responding
11/12/10 00:06:52 000001M|00/24/0/015|=3:2050=UA Terminal 15 Loss
11/12/10 00:07:02 000001M|00/24/0/014|=5:2053=Terminal 14 in service
11/12/10 00:07:02 000001M|00/24/0/015|=5:2053=Terminal 15 in service
11/12/10 00:11:14 000001M|00/24/0/015|=3:2050=UA Terminal 15 Loss
11/12/10 00:11:14 000001M|00/24/-/---|=4:3754=UA link no longer responding
11/12/10 00:11:20 000001M|00/24/0/014|=5:2053=Terminal 14 in service
11/12/10 00:11:20 000001M|00/24/0/015|=5:2053=Terminal 15 in service
11/12/10 00:15:06 000001M|00/24/0/015|=3:2050=UA Terminal 15 Loss
11/12/10 00:15:06 000001M|00/24/-/---|=4:3754=UA link no longer responding
11/12/10 00:15:06 000001M|00/24/0/014|=3:2050=UA Terminal 14 Loss
11/12/10 00:15:06 000001M|00/24/-/---|=4:3754=UA link no longer responding
11/12/10 00:15:15 000001M|00/24/0/014|=5:2053=Terminal 14 in service
11/12/10 00:15:15 000001M|00/24/0/015|=5:2053=Terminal 15 in service
11/12/10 00:16:07 000001M|00/24/0/015|=3:2050=UA Terminal 15 Loss
11/12/10 00:16:07 000001M|00/24/-/---|=4:3754=UA link no longer responding
11/12/10 00:16:07 000001M|00/24/0/014|=3:2050=UA Terminal 14 Loss
11/12/10 00:16:07 000001M|00/24/-/---|=4:3754=UA link no longer responding
11/12/10 00:16:17 000001M|00/24/0/014|=5:2053=Terminal 14 in service
11/12/10 00:16:17 000001M|00/24/0/015|=5:2053=Terminal 15 in service
11/12/10 00:16:38 000001M|00/24/0/014|=3:2050=UA Terminal 14 Loss
11/12/10 00:16:38 000001M|00/24/-/---|=4:3754=UA link no longer responding
11/12/10 00:16:38 000001M|00/24/0/015|=3:2050=UA Terminal 15 Loss
11/12/10 00:16:38 000001M|00/24/-/---|=4:3754=UA link no longer responding
11/12/10 00:16:48 000001M|00/24/0/014|=5:2053=Terminal 14 in service
11/12/10 00:16:49 000001M|00/24/0/015|=5:2053=Terminal 15 in service
11/12/10 00:20:05 000001M|00/24/0/014|=5:2053=Terminal 14 in service
11/12/10 00:20:05 000001M|00/24/0/015|=5:2053=Terminal 15 in service
11/12/10 00:21:26 000001M|00/24/0/014|=3:2050=UA Terminal 14 Loss
11/12/10 00:21:26 000001M|00/24/-/---|=4:3754=UA link no longer responding
11/12/10 00:21:26 000001M|00/24/0/015|=3:2050=UA Terminal 15 Loss
11/12/10 00:21:26 000001M|00/24/-/---|=4:3754=UA link no longer responding
11/12/10 00:21:34 000001M|00/24/0/014|=5:2053=Terminal 14 in service
11/12/10 00:21:34 000001M|00/24/0/015|=5:2053=Terminal 15 in service
11/12/10 00:22:57 000001M|00/24/0/014|=3:2050=UA Terminal 14 Loss
11/12/10 00:22:57 000001M|00/24/-/---|=4:3754=UA link no longer responding
11/12/10 00:22:57 000001M|00/24/0/015|=3:2050=UA Terminal 15 Loss
11/12/10 00:22:57 000001M|00/24/-/---|=4:3754=UA link no longer responding
11/12/10 00:23:07 000001M|00/24/0/014|=5:2053=Terminal 14 in service
11/12/10 00:23:07 000001M|00/24/0/015|=5:2053=Terminal 15 in service
11/12/10 00:27:32 000001M|00/24/0/014|=5:2053=Terminal 14 in service
11/12/10 00:27:32 000001M|00/24/0/015|=5:2053=Terminal 15 in service
11/12/10 00:29:14 000001M|00/24/0/015|=3:2050=UA Terminal 15 Loss
11/12/10 00:29:14 000001M|00/24/-/---|=4:3754=UA link no longer responding
11/12/10 00:29:14 000001M|00/24/0/014|=3:2050=UA Terminal 14 Loss
11/12/10 00:29:14 000001M|00/24/-/---|=4:3754=UA link no longer responding
11/12/10 00:29:20 000001M|00/24/0/014|=5:2053=Terminal 14 in service
11/12/10 00:29:20 000001M|00/24/0/015|=5:2053=Terminal 15 in service
11/12/10 00:35:36 000001M|00/24/0/015|=3:2050=UA Terminal 15 Loss
11/12/10 00:35:36 000001M|00/24/-/---|=4:3754=UA link no longer responding
11/12/10 00:35:36 000001M|00/24/0/014|=3:2050=UA Terminal 14 Loss
11/12/10 00:35:36 000001M|00/24/-/---|=4:3754=UA link no longer responding
11/12/10 00:35:42 000001M|00/24/0/014|=5:2053=Terminal 14 in service
11/12/10 00:35:43 000001M|00/24/0/015|=5:2053=Terminal 15 in service
11/12/10 00:35:43 000001M|00/24/0/014|=3:2050=UA Terminal 14 Loss
11/12/10 00:35:44 000001M|00/24/-/---|=4:3754=UA link no longer responding
11/12/10 00:35:44 000001M|00/24/0/015|=3:2050=UA Terminal 15 Loss
11/12/10 00:35:44 000001M|00/24/-/---|=4:3754=UA link no longer responding
11/12/10 00:35:53 000001M|00/24/0/014|=5:2053=Terminal 14 in service
11/12/10 00:35:53 000001M|00/24/0/015|=5:2053=Terminal 15 in service
11/12/10 00:38:28 000001M|00/24/0/014|=5:2053=Terminal 14 in service
11/12/10 00:38:28 000001M|00/24/0/015|=5:2053=Terminal 15 in service
11/12/10 00:39:24 000001M|00/24/0/014|=5:2053=Terminal 14 in service
11/12/10 00:39:24 000001M|00/24/0/015|=5:2053=Terminal 15 in service
11/12/10 00:44:36 000001M|00/24/0/015|=3:2050=UA Terminal 15 Loss
11/12/10 00:44:36 000001M|00/24/-/---|=4:3754=UA link no longer responding
11/12/10 00:44:36 000001M|00/24/0/014|=3:2050=UA Terminal 14 Loss
11/12/10 00:44:36 000001M|00/24/-/---|=4:3754=UA link no longer responding
11/12/10 00:44:45 000001M|00/24/0/014|=5:2053=Terminal 14 in service
11/12/10 00:44:45 000001M|00/24/0/015|=5:2053=Terminal 15 in service
11/12/10 00:45:47 000001M|00/24/0/014|=3:2050=UA Terminal 14 Loss
11/12/10 00:45:47 000001M|00/24/-/---|=4:3754=UA link no longer responding
11/12/10 00:45:47 000001M|00/24/-/---|=4:3754=UA link no longer responding
11/12/10 00:45:47 000001M|00/24/0/015|=3:2050=UA Terminal 15 Loss
11/12/10 00:45:54 000001M|00/24/0/014|=5:2053=Terminal 14 in service
11/12/10 00:45:54 000001M|00/24/0/015|=5:2053=Terminal 15 in service
11/12/10 00:59:11 000001M|00/24/0/014|=3:2050=UA Terminal 14 Loss
11/12/10 00:59:11 000001M|00/24/-/---|=4:3754=UA link no longer responding
11/12/10 00:59:11 000001M|00/24/-/---|=4:3754=UA link no longer responding
11/12/10 00:59:11 000001M|00/24/0/015|=3:2050=UA Terminal 15 Loss
11/12/10 00:59:20 000001M|00/24/0/014|=5:2053=Terminal 14 in service
11/12/10 00:59:20 000001M|00/24/0/015|=5:2053=Terminal 15 in service
11/12/10 01:06:47 000001M|00/24/0/014|=5:2053=Terminal 14 in service
11/12/10 01:06:47 000001M|00/24/0/015|=5:2053=Terminal 15 in service
11/12/10 01:10:48 000001M|00/24/0/014|=3:2050=UA Terminal 14 Loss
11/12/10 01:10:48 000001M|00/24/-/---|=4:3754=UA link no longer responding
11/12/10 01:10:49 000001M|00/24/0/015|=3:2050=UA Terminal 15 Loss
11/12/10 01:10:49 000001M|00/24/-/---|=4:3754=UA link no longer responding
11/12/10 01:10:56 000001M|00/24/0/014|=5:2053=Terminal 14 in service
11/12/10 01:10:57 000001M|00/24/0/015|=5:2053=Terminal 15 in service
11/12/10 01:18:41 000001M|00/24/0/014|=3:2050=UA Terminal 14 Loss
11/12/10 01:18:41 000001M|00/24/-/---|=4:3754=UA link no longer responding
11/12/10 01:18:41 000001M|00/24/-/---|=4:3754=UA link no longer responding
11/12/10 01:18:41 000001M|00/24/0/015|=3:2050=UA Terminal 15 Loss
11/12/10 01:18:48 000001M|00/24/0/014|=5:2053=Terminal 14 in service
11/12/10 01:18:48 000001M|00/24/0/015|=5:2053=Terminal 15 in service
11/12/10 01:24:47 000001M|00/24/0/014|=5:2053=Terminal 14 in service
11/12/10 01:24:47 000001M|00/24/0/015|=5:2053=Terminal 15 in service
11/12/10 01:30:39 000001M|00/24/0/014|=3:2050=UA Terminal 14 Loss
11/12/10 01:30:39 000001M|00/24/-/---|=4:3754=UA link no longer responding
11/12/10 01:30:39 000001M|00/24/-/---|=4:3754=UA link no longer responding
11/12/10 01:30:39 000001M|00/24/0/015|=3:2050=UA Terminal 15 Loss
11/12/10 01:30:51 000001M|00/24/0/014|=5:2053=Terminal 14 in service
11/12/10 01:30:51 000001M|00/24/0/015|=5:2053=Terminal 15 in service
11/12/10 01:37:53 000001M|00/24/0/014|=3:2050=UA Terminal 14 Loss
11/12/10 01:37:53 000001M|00/24/-/---|=4:3754=UA link no longer responding
11/12/10 01:37:53 000001M|00/24/-/---|=4:3754=UA link no longer responding
11/12/10 01:37:53 000001M|00/24/0/015|=3:2050=UA Terminal 15 Loss
11/12/10 01:38:05 000001M|00/24/0/014|=5:2053=Terminal 14 in service
11/12/10 01:38:05 000001M|00/24/0/015|=5:2053=Terminal 15 in service
11/12/10 01:39:16 000001M|00/24/0/014|=3:2050=UA Terminal 14 Loss
11/12/10 01:39:16 000001M|00/24/-/---|=4:3754=UA link no longer responding
11/12/10 01:39:16 000001M|00/24/-/---|=4:3754=UA link no longer responding
11/12/10 01:39:16 000001M|00/24/0/015|=3:2050=UA Terminal 15 Loss
11/12/10 01:39:24 000001M|00/24/0/014|=5:2053=Terminal 14 in service
11/12/10 01:39:24 000001M|00/24/0/015|=5:2053=Terminal 15 in service
11/12/10 01:40:57 000001M|00/24/0/014|=3:2050=UA Terminal 14 Loss
11/12/10 01:40:57 000001M|00/24/-/---|=4:3754=UA link no longer responding
11/12/10 01:40:57 000001M|00/24/0/015|=3:2050=UA Terminal 15 Loss
11/12/10 01:40:57 000001M|00/24/-/---|=4:3754=UA link no longer responding
11/12/10 01:41:09 000001M|00/24/0/014|=5:2053=Terminal 14 in service
11/12/10 01:41:09 000001M|00/24/0/015|=5:2053=Terminal 15 in service
11/12/10 01:55:23 000001M|00/24/0/014|=3:2050=UA Terminal 14 Loss
11/12/10 01:55:23 000001M|00/24/-/---|=4:3754=UA link no longer responding
11/12/10 01:55:23 000001M|00/24/0/015|=3:2050=UA Terminal 15 Loss
11/12/10 01:55:23 000001M|00/24/-/---|=4:3754=UA link no longer responding
11/12/10 01:55:30 000001M|00/24/0/014|=5:2053=Terminal 14 in service
11/12/10 01:55:30 000001M|00/24/0/015|=5:2053=Terminal 15 in service
11/12/10 01:56:54 000001M|00/24/0/014|=3:2050=UA Terminal 14 Loss
11/12/10 01:56:54 000001M|00/24/-/---|=4:3754=UA link no longer responding
11/12/10 01:56:54 000001M|00/24/-/---|=4:3754=UA link no longer responding
11/12/10 01:56:54 000001M|00/24/0/015|=3:2050=UA Terminal 15 Loss
11/12/10 01:57:03 000001M|00/24/0/014|=5:2053=Terminal 14 in service
11/12/10 01:57:03 000001M|00/24/0/015|=5:2053=Terminal 15 in service
11/12/10 02:00:18 000001M|00/24/0/014|=5:2053=Terminal 14 in service
11/12/10 02:00:18 000001M|00/24/0/015|=5:2053=Terminal 15 in service
11/12/10 02:02:35 000001M|00/24/0/014|=5:2053=Terminal 14 in service
11/12/10 02:02:35 000001M|00/24/0/015|=5:2053=Terminal 15 in service
11/12/10 02:03:36 000001M|00/24/0/015|=3:2050=UA Terminal 15 Loss
11/12/10 02:03:36 000001M|00/24/-/---|=4:3754=UA link no longer responding
11/12/10 02:03:36 000001M|00/24/0/014|=3:2050=UA Terminal 14 Loss
11/12/10 02:03:36 000001M|00/24/-/---|=4:3754=UA link no longer responding
11/12/10 02:03:48 000001M|00/24/0/014|=5:2053=Terminal 14 in service
11/12/10 02:03:48 000001M|00/24/0/015|=5:2053=Terminal 15 in service
11/12/10 02:06:10 000001M|00/24/0/014|=3:2050=UA Terminal 14 Loss
11/12/10 02:06:10 000001M|00/24/-/---|=4:3754=UA link no longer responding
11/12/10 02:06:10 000001M|00/24/0/015|=3:2050=UA Terminal 15 Loss
11/12/10 02:06:10 000001M|00/24/-/---|=4:3754=UA link no longer responding
11/12/10 02:06:17 000001M|00/24/0/014|=5:2053=Terminal 14 in service
11/12/10 02:06:17 000001M|00/24/0/015|=5:2053=Terminal 15 in service
11/12/10 02:08:31 000001M|00/24/0/015|=3:2050=UA Terminal 15 Loss
11/12/10 02:08:31 000001M|00/24/-/---|=4:3754=UA link no longer responding
11/12/10 02:08:31 000001M|00/24/0/014|=3:2050=UA Terminal 14 Loss
11/12/10 02:08:31 000001M|00/24/-/---|=4:3754=UA link no longer responding
11/12/10 02:08:43 000001M|00/24/0/014|=5:2053=Terminal 14 in service
11/12/10 02:08:43 000001M|00/24/0/015|=5:2053=Terminal 15 in service
11/12/10 02:09:48 000001M|00/24/0/014|=5:2053=Terminal 14 in service

[vad]

On UA board present current limiter (one for two circuits - 0-1, 2-3...). If one sets (f.e. 00-24-15) broken (exceed current limits) - both sets will be disconnected (00-24-15 and 00-24-14).
Disconnect (replays one set - 00-24-15), if not helped - another (00-24-14). Or change UA board 0-24 with another one - you will check problem in the sets or in the board.

[Xero]

i am sure the problem is not with the sets because these incidents are occurring on other two digital boards as well but i wonder how can all 3 UA boards become faulty :S :S

[vad]

Try to find something common - may be you have big sets with additional modules,
check power supply voltage - if your system with CPU6 (crystal hardware) - voltage from DC power supply must be not more then 54,4 V.

[Xero]

Hi Vad,

I have checked the power supply, its stable and give 50V, and no add on modules are connected to any phone. could it be due to the problem in wiring from MDF to phone sets?

[vad]

Yes. Not very often. Maynly when used not good cable - quad, group twisted (instead of twisted pair), not twisted. Or when in UTP cable used wrong wires (f.e. one cable for 4 sets - if from RG-45 you will use 1-2, 3-4, 5-6, 7-8 instead of 1-2, 3-6, 4-5, 7-8 - you will have problem).