Overview
A “Repeater Temperature High” alarm is a common notification generated by the system when thermal thresholds are briefly exceeded within a repeater unit. These events often occur during planned maintenance, short-term power fluctuations, or after environmental changes such as seawater temperature variation.
Why this happens
Power feed adjustments or load balancing can momentarily increase internal repeater temperature.
Maintenance activities (e.g., amplifier testing, firmware upgrades) can cause temporary spikes.
Environmental conditions near branching units can also influence sensor readings.
Recommended actions
Verify current maintenance activities
Check your project maintenance schedule or recent activity logs to confirm if work was planned in the affected segment.Monitor the alarm duration
If the alarm clears within 10 minutes, no further action is needed.
If the alarm persists longer than 10 minutes, capture the repeater’s event log for GTSC review.
Check for recurring alarms
Repeated temperature alarms on the same repeater may indicate hardware degradation or calibration drift; report this pattern to GTSC.
When to contact GTSC
Contact GTSC if:
The alarm persists beyond 10 minutes.
Multiple repeaters on the same segment trigger temperature alarms.
You observe concurrent power or communication alarms.
Provide the system name, repeater ID, time of occurrence, and any supporting logs to help expedite troubleshooting.
Additional resources
Repeater System Diagnostics Overview
Thermal Event Best Practices for NOC Monitoring Teams
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