| Probable Cause Id | Alarm Event |
| 5001 | Media Failure |
| 5002 | Underlying Protection Degraded |
| 5003 | RS Failure |
| 5004 | Excessive BER |
| 5005 | Degraded Signal |
| 5006 | Configuration Mismatch |
| 5007 | Transport Failure |
| 5008 | Client Failure |
| 5009 | Quality Threshold Crossed 15m |
| 5010 | Quality Threshold Crossed 24h |
| 5011 | MS Configuration Mismatch |
| 5012 | Remote Failure |
| 5013 | Equipment Failure |
| 5014 | Connectivity Problem |
| 5015 | OSC Failure |
| 5025 | Threshold Corrected Errors |
| 5017 | SHDSL Problem |
| 5018 | Transport Outgoing Failure |
| 5019 | Transport Incoming Failure |
| 5020 | Tandem Connection Failure |
| 5021 | Incoming Tandem Connection Failure |
| 5022 | Outgoing Tandem Connection Failure |
| 5023 | Tandem Connection Degraded Signal |
| 5024 | Tandem Connection Threshold Crossed 15m |
| 5025 | Tandem Connection Threshold Crossed 24h |
| 5026 | Remote Power Supply Failure |
| 5027 | Server Media Failure |
| 5028 | Degraded Protection |
| 5029 | Bandwidth Reduced |
| 5030 | SNC Failure |
| 5031 | LCAS Protocol Error |
| 5032 | LCAS Exceeding Differential Delay |
| 5033 | Not Aligned Consistency Status |
| 5034 | SNC Rerouted |
| 5035 | SNC Ready To Revert |
| 5036 | SNC Reversion Blocked |
| 5037 | SNC Backup Unavailable |
| 5038 | SNC Sncp Degraded |
| 5039 | Failed To Align Consistency Status |
| 5040 | GMRE Degraded |
| 5041 | GMRE In Migration |
| 5042 | SNC Not Disjointed |
| 5043 | NP Degraded |
| 5044 | NP Fault |
| 5045 | sncFailed zEnd |
| 5046 | FEC Threshold Crossed 15m |
| 5047 | FEC Threshold Crossed 24h |
| 5048 | VLAN SNC Failure |
| 5049 | Incoming VLAN SNC Failure |
| 5050 | Outgoing VLAN SNC Failure |
| 5051 | CP Communication Interface Problem |
| 5052 | GFP Protocol Error |
| 5053 | SNC Active Unavailable |
| 5054 | SNC Auto Restoration Disabled |
| 5055 | GMRE Auto Restoration Disabled |
| 5056 | DCN Failure |
| 5060 | powerFailure |
| 5065 | Transport Locked |
| 5066 | Transport Outgoing Locked |
| 5067 | Transport Incoming Locked |
| 5069 | opticalIntrusion |
| 5070 | Reroute not Possible |
| 5075 | Active Failed - Transmission Problem |
| 5076 | Active Failed - Preemption |
| 5077 | Active Failed - Ape Failed |
| 5078 | Network Configuration Problem |
| 5084 | Active Failed - Unprotected |
| 5090 | Optical Power Out of Range |
| 5093 | Wavekey Issue |
| 5094 | Active Failed - Unprotected |
| 5095 | Optical Lane High Threshold Crossed |
| 5096 | Optical Lane Low Threshold Crossed |
| 5098 | lossOfPayload |
| 5101 | aprLine |
| 5102 | aprUnavailable |
| 5103 | opticalChannelIssue |