中兴c300下这些告警是什么意思？

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An alarm 43016 level critical occurred at 08:34:08 09/29/2016 UTC  sent by MCP  Epon alarm OnuOffLine: shelf 1 slot 9 olt 2 onu 42 level 0
An alarm 43061 level notifications occurred at 07:18:47 09/29/2016 UTC  sent by MCP  Epon inform OnuDyingGasp: shelf 1 slot 9 olt 2 onu 1 level 6
An alarm 43265 level critical occurred at 07:18:47 09/29/2016 UTC  sent by MCP  Epon alarm OnuPowerOff: shelf 1 slot 9 olt 2 onu 1 level 0
An alarm 43520 level notifications occurred at 07:13:48 09/29/2016 UTC  sent by MCP  EPON inform ExtendedOAM Event: shelf 1 slot 9 olt 2 onu 2 level 6
An alarm 43061 level notifications occurred at 07:13:48 09/29/2016 UTC  sent by MCP  Epon inform OnuDyingGasp: shelf 1 slot 9 olt 2 onu 2 level 6