In large multi-tiered hierarchical alarm systems for high capacity telecommunications transmission systems, it is important to notify the maintenance craft of only the highest alarm, and to notify only when the alarm has been validated by persisting for a sufficiently long time. Advantageously,...http://www.google.es/patents/US5745032?utm_source=gb-gplus-sharePatente US5745032 - Processing facility alert and alarm indications for multiplexed transmission facilities having a plurality of multiplex levels
Processing facility alert and alarm indications for multiplexed transmission ...
