Carrier-Grade Alarm System

The basic alarm system has been extended to a carrier-grade alarm system. A carrier‑grade alarm system provides a reliable alarm reporting mechanism that takes into account EMS outages, network outages, and transport mechanism such as SNMP over UDP.

A carrier-grade alarm system is characterized by the following:

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The device allows an EMS to determine which alarms are currently active in the device. That is, the device maintains an active alarm table.

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The device allows an EMS to detect lost alarms and clear notifications [sequence number in trap, current sequence number MIB object]

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The device allows an EMS to recover lost alarm raise and clear notifications [maintains a log history]

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The device sends a cold start trap to indicate that it is starting. This allows the EMS to synchronize its view of the device's active alarms.

When the SNMP alarm traps are sent, the carrier-grade alarm system does not add or delete alarm traps as part of the feature. This system provides the mechanism for viewing of history and current active alarm information.