Quality Thresholds
Continuous monitoring of ASR, MOS, PDD, jitter, and packet loss against configurable per-carrier thresholds. Alerts fire the moment a carrier breaches SLA — not after your customers start complaining.
The Cost of Missed Quality Thresholds
When carrier quality degrades undetected, every minute costs real money and customer trust. Threshold breaches that go unnoticed become SLA violations, churn events, and capacity waste.
- Revenue loss from calls that fail to connect or are abandoned due to poor quality
- Customer churn when quality issues persist long enough to become a visible problem
- SLA violation penalties when carriers breach contracted quality commitments
- Capacity waste routing traffic over degraded paths when healthy alternatives exist
How Quality Threshold Detection Works
Four measurement streams run continuously and are evaluated against per-carrier, per-direction thresholds every five minutes.
Answer Seizure Ratio tracked per carrier and direction. Alerts when ASR drops below the configured floor for sustained periods.
Mean Opinion Score calculated from RTP stream analysis. Flags carriers whose MOS falls below the acceptable quality threshold.
Post-dial delay measured per call and aggregated per carrier. Sustained PDD elevation triggers threshold alerts separate from PDD Anomaly engine.
Jitter and packet loss measured from captured RTP streams. Per-carrier thresholds distinguish acceptable variation from genuine degradation.
Why GSNOC Quality Thresholds Are Different
- Per-carrier thresholds — different carriers have different baseline performance; one-size-fits-all thresholds generate noise
- 5-minute evaluation intervals catch degradation within a single monitoring cycle, not after hours of accumulation
- Direction-aware monitoring — inbound and outbound quality are tracked separately since they degrade independently
- Maintenance window suppression prevents scheduled carrier downtime from flooding your alert queue
Key Metrics
Answer Seizure Ratio — percentage of call attempts that connect successfully
Mean Opinion Score — perceptual voice quality score from 1 (unusable) to 5 (excellent)
Post-Dial Delay — time from dial to first ring or answer in milliseconds
RTP packet arrival variance in milliseconds — high jitter degrades perceived quality
Percentage of RTP packets lost in transit — directly impacts MOS score
Average Call Duration — sustained drops signal quality so poor users are hanging up