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Grid & Utilities · SCADA Backhaul · Mission-Critical Uptime

When infrastructure connectivity fails,
the consequences are different.

Power substations, water treatment works, gas networks, rail signalling — these systems need connectivity that treats reliability and security as requirements, not features.

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Private APN
No public internet
4-Network
Carrier redundancy
Fixed IP
SCADA-ready
Audit Trail
Full event log
The Gap Standard SIMs Leave Open

What a commercial IoT SIM gives you — and what CNI actually requires.

Standard commercial IoT SIM

  • Single network — single point of failure
    Carrier outage or mast maintenance = SCADA blackout at that site.
  • Traffic on shared public internet
    Control system data traverses public infrastructure you don't control, can't audit, and can't isolate.
  • Dynamic IPs — unpredictable firewall rules
    Without fixed IP, your OT team cannot maintain precise allow-lists for remote devices.
  • No estate-wide visibility
    SIM status and usage scattered across carrier portals. No single audit trail for compliance evidence.

Zentari for CNI

  • Unsteered roaming across all 4 UK networks
    If one carrier has an outage, the SIM moves to the next best network automatically — no intervention, no SCADA gap.
  • Private APN — traffic goes direct to your perimeter
    All device traffic routes to your control system via a private APN. No public internet transit. GDPR and NIS-compliant by design.
  • Fixed IP on every device
    Static addressing lets your OT security team define precise firewall allow-lists and maintain them indefinitely.
  • Single portal, full audit trail
    Every SIM visible in Axis. Every activation, suspension and usage event logged and timestamped — ready for compliance evidence.
Sectors We Connect

The infrastructure that keeps the country running.

01
Power Grid & Substations

Remote substation monitoring where fixed-line backhaul isn't viable.

Distribution substations in rural areas, renewable energy sites and grid edge infrastructure often lack fixed-line connectivity. Multi-network SIMs ensure SCADA links stay up even when a carrier has localised issues, while private APN routing keeps all telemetry off the public internet.

02
Water & Wastewater

Distributed monitoring from treatment works to pumping stations.

Flow sensors, pressure monitors, level gauges and chemical dosing systems across wide geographic areas — from rural treatment works to urban booster stations in basement locations. Multi-network SIMs handle the full range of site types, including challenging underground chamber installations.

03
Gas & Pipeline Networks

Pressure and flow monitoring along remote distribution routes.

Above-ground monitoring installations on gas transmission and distribution pipelines span remote rural terrain where fixed-line isn't available and single-carrier coverage can be unreliable. Multi-network SIMs with private APN backhaul keep the monitoring link intact and SCADA traffic secure.

04
Rail Infrastructure

Trackside monitoring and remote condition assessment.

Wheel impact load detectors, hot axle box sensors, trackside environmental monitors and level crossing systems require reliable backhaul along entire route lengths. Multi-network SIMs maintain the data feeds that support predictive maintenance and safety systems — even where individual carriers have lineside gaps.

Technical Specification

What your OT security and procurement teams will ask. Here are the answers.

CNI operators face specific questions that commercial IoT SIM platforms often can't answer confidently: data sovereignty, carrier independence, static addressing, and compliance audit evidence. Zentari's platform is designed around these requirements from the ground up.

Whether you're connecting a single remote pumping station or building a SCADA backhaul network across hundreds of sites, the same platform, the same security architecture and the same support team serves your entire estate.

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Unsteered multi-network roaming — all 4 UK carriers
Connects to whichever network has the strongest signal. No carrier steering, no single point of failure.
Private APN — all traffic off the public internet
SCADA and telemetry traffic enters your network perimeter directly. Supports NIS Regulations and GDPR Article 32 technical measures.
Fixed IP addressing on every SIM
Static IPs allow precise OT firewall allow-lists. Define which endpoints each device class can reach and maintain that policy indefinitely.
4G LTE / 5G with 3G/2G fallback
High-bandwidth where available; falls back to narrowband for critical alarm signalling in low-coverage locations.
Full event audit trail via the Axis Portal
Every activation, suspension, data usage event and SIM command is logged and timestamped. Exportable for compliance evidence submissions.
GSMA SGP.02 eUICC for sealed hardware
OTA profile management for sealed, IP-rated enclosures. No physical SIM access needed post-installation.

Fixed IP & Private APN

Static addressing and private routing — the foundation of SCADA and OT connectivity.

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Smart Cities

Traffic sensors, urban IoT and city-scale deployments on one managed platform.

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Talk to the team

Bring us your infrastructure type, security requirements and connectivity challenges — we'll build a tailored solution.

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Global network connectivity

Ready to secure your infrastructure connectivity?

CNI operators across the UK rely on Zentari for resilient, private-network cellular connectivity that meets their security and uptime requirements.

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