How to monitor optical receive power and alert your NOC before subscribers notice the dropout.
Most subscriber complaints about 'slow internet' are actually degrading optical signal. A healthy ONU sits between -8 dBm and -27 dBm.
Below -27 dBm you'll see retransmits, video buffering, and eventually total loss. Above -8 dBm the receiver saturates and link flaps.
Polling all ONUs every 60 seconds and alerting on a 3 dBm drop within a 24h window catches almost every failing splice before the customer notices.
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