Communications (COM)
| Probable Cause | SNMP/TL1 | Service Affecting | Troubleshooting Procedure |
| Communications Failure | CONTCOM | No | Communications Failure |
| Element Manager Communications Problem | EMSCOMMLOS | No | EMS to ONT Communications Problem |
| No VLAN Egress Provisioned | VLAN-PROV-ERR | No | No VLAN Egress Provisioned |
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