Reference architecture: three independent alarm layers

Reference architecture: three independent alarm layers An architecture diagram generated by Archify. Equipment + sensors · LN2, fridges, power · Each hospital (on UPS) · Tier A / B / C Equipment + sensors LN2, fridges, power Tier A / B / C Layer 1: device alarm · built into equipment · Each hospital (on UPS) Layer 1: device alarm built into equipment Layer 2: site edge · gateway on UPS + 4G · Each hospital (on UPS) · works offline Layer 2: site edge gateway on UPS + 4G works offline Siren + GSM modem · on-site alerts · Each hospital (on UPS) Siren + GSM modem on-site alerts Layer 3: central platform · escalation, audit · Cloud: Indian region Layer 3: central platform escalation, audit SMS + voice · TRAI DLT registered · Architecture component SMS + voice TRAI DLT registered On-call staff · primary + backup · Architecture component On-call staff primary + backup Modbus / SNMP local outbound TLS if breach escalate SMS, call GSM fallback Each hospital (on UPS) Cloud: Indian region Legend Frontend Backend Cloud Security Message bus External

Layer 1 · device

  • • Mandated local alarm (ART Rules, Schedule F)
  • • Survives every failure except the device

Layer 2 · site edge

  • • Alarms evaluated on site
  • • Siren and GSM work with no internet

Layer 3 · central

  • • Escalation with acknowledgement
  • • Append-only audit trail in India