All MIBs › NMS-EPON-ONU-SERIAL-TRAP
Description: Trap MIB for NMS EPON ONU serial port break, recovery, and loopback detection status change events
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What Is NMS-EPON-ONU-SERIAL-TRAP?
NMS-EPON-ONU-SERIAL-TRAP is a vendor-specific trap/notification MIB from NMS Communications that reports serial port status change events for EPON Optical Network Units, specifically break, recovery, and loopback detection conditions on the ONU's serial (console/data) interface. Rather than exposing pollable tables, it defines SNMP trap notifications that fire asynchronously when the serial port transitions state, a break event (0) or a recover event (1), providing near-real-time fault/status alerting instead of periodic polling data. This is a fault/event monitoring MIB used to detect hardware/interface-level problems on the ONU's serial interface, such as a disconnected serial cable, an unplugged auxiliary device, or a serial loopback condition indicating a wiring or hardware fault, which would otherwise go unnoticed between polling cycles. It depends functionally on the broader NMS EPON ONU MIB family (reset, multicast VLAN) for full device context, since a serial trap is meaningful alongside knowledge of the ONU's overall status. It is deployed in EPON fiber access deployments where the ONU's serial interface carries auxiliary data (e.g., to a co-located device) and operators need immediate notification of serial-link faults. Engineers can download the NMS-EPON-ONU-SERIAL-TRAP file directly to load it into their MIB browser.
IPNetwork Monitor allows you to monitor SNMP objects defined in NMS-EPON-ONU-SERIAL-TRAP. Use the built-in SNMP Monitoring Browser to explore available variables, view their current values and descriptions, and select the objects you want to monitor. You can then create SNMP monitors, configure thresholds, and receive alerts when monitored values change.
Supported Devices
- NMS Communications EPON Optical Network Unit (ONU)
Monitoring Examples
A NOC monitoring system would subscribe to this MIB's trap so that when an ONU's serial port experiences a break condition (e.g., a technician disconnects a serial cable during on-site work), an alert fires immediately rather than waiting for the next poll cycle. A subsequent recovery trap confirms the serial link was restored, letting the NOC close the alert automatically. A loopback-detection trap firing repeatedly on one ONU would point to a hardware fault or miswiring on that unit's serial port needing physical inspection.
What Can Be Monitored
- serial port break event
- serial port recovery event
- serial loopback detection
- serial interface fault history
Imported Objects
From NMS-EPON-LLID
| llidIfIndex | OBJECT-TYPE |
From NMS-EPON-ONU
| onuID | OBJECT-TYPE |
| onuIfSequenceNo | OBJECT-TYPE |
From NMS-SMI
| nmsEPONGroup | OBJECT-IDENTITY |
From RFC1213-MIB
| ifDescr |
From SNMPv2-CONF
| MODULE-COMPLIANCE | |
| NOTIFICATION-GROUP | |
| OBJECT-GROUP |
From SNMPv2-SMI
| MODULE-IDENTITY | |
| NOTIFICATION-TYPE | |
| OBJECT-TYPE |
OIDs
RFC description
Monitors serial port status and generates SNMP traps for EPON ONU (Optical Network Unit) devices.
Start monitoring NMS Communications EPON ONUs with a free 30-day trial of IPNetwork Monitor. Import MIBs, browse SNMP OIDs, create custom SNMP monitors, configure alerts, and monitor any SNMP-enabled network device from a single console.