Trusted where the data cannot leave the building.

Defense

Air-gapped infrastructure with strict data residency; multi-site, multi-cluster.

Critical infrastructure

Energy, transport and utilities where telephony is part of the operational chain.

Public sector

Ministries, agencies and municipalities running on-prem Cisco for years.

Finance & insurance

Regulated environments with audit and retention requirements.

Healthcare

Hospitals and providers where a dead trunk is a patient-safety issue.

Industry

Manufacturers with plants, gateways and rooms across several countries.

Replaced manual morning checks across all clusters with nightly Health Checks; call records and configuration snapshots retained for two years to answer audit questions.

Monthly quality and health reporting for the service owner; Health Check history used in the internal SLA review.

Room utilization and health across all sites on one board; certificate expiry and backup failures alerted before they became outages.

Carrier disputes settled with call evidence from both CUCM and the gateways; gateway changes moved from CLI to validated forms.