Group 2 alarms are either continuous or discontinuous. The threshold count is determined in LD 73. Grade-of-service is changed based on how quickly the threshold of the counter is exceeded. Group 1 alarms are event-driven and include indicators that decrement a counter whenever an error is detected. LD 17: CHG OVLY, BKGD 60 (LD 22: PRT OVLY). Use during maintenance, when the circuit would otherwise be automatically disabled due to excessive slips. Note: LD 60 as a background task, will periodically (~45 seconds) display and reset the alarm counters. RCNT (loop) Reset contents of alarm counters for loop (or all).LCNT (loop) List contents of alarm counters for loop (or all).When a threshold is exceeded, the circuit is out of service. A healthy PRI will indicate all zeros (no alarm counts), otherwise a number indicates how often a particular error has occurred. When the alarm is cleared, reset the counters and bounce (disable, then enable) the PRI in LD 60:Ĭounters are split into Group 1, Group 2, and 24 hour Group 2 total alarms. ➤ Yellow: Far End Alarm (FEA) When a Yellow alarm occurs, all B-channels are disabled, and an alarm counter is incremented.īUT, if the 24-hour threshold (prompt RALM in LD 73) is reached, the PRI must be manually restored to service. When the alarm is cleared, the PRI is automatically restored to service, and B-channels enabled.Ĭheck the PRI Status and reset the counters in LD 60: ➤ Red: Near End Alarm (NEA) When a Red alarm occurs, all B-channels are disabled. Yellow Alarm is received, so check TX Alarms.Red Alarm = nothing received, so check RX.
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