Escalate critical alerts to your on-call rotation instead of relying on someone watching a dashboard.
In PagerDuty, create (or choose an existing) service for network alerts, and generate an integration key from its Events API v2 integration.
Paste the integration key under Settings > Integrations > PagerDuty.
Critical Zynty alerts should map to a high-urgency PagerDuty incident; Warning-level alerts are usually better mapped to low urgency or excluded from paging entirely.
Trigger a test critical alert and confirm it reaches the right on-call schedule, not just that it "arrives" in PagerDuty.