Document operational dependency
Identify which calls, devices and workflows support safety, control, dispatch and service continuity.
Solutions
Critical Infrastructure Communications
Protect operational voice and modernize legacy systems across distributed, safety-sensitive sites.
Distributed sites
Operational continuity
Secure modernization
CRITICAL INFRASTRUCTURE COMMUNICATIONS
What you can do with it
Secure operational voice and modernize legacy services across distributed, safety-sensitive sites without treating phones, alarms, intercoms and control-room workflows as ordinary office endpoints.
Distributedsite architecture
Legacy + IPcontrolled coexistence
Lifecycleoperational governance
CAPABILITIES
Capabilities that matter for your project
Segment and secure
Use Sentinel to establish a protected SIP boundary and Mediatrix gateways for validated legacy interfaces.
Modernize in phases
Test endpoint behavior, power, failover, monitoring and acceptance before each site cutover.
DEPLOYMENT FIT
Best suited for
- Utilities and energy
- Transportation
- Airports and ports
- Public safety
- Industrial and remote facilities
KEY SPECIFICATIONS
Important selection data
Secure edgeSentinel SBC
Legacy accessMediatrix FXS/FXO/BRI/PRI platforms
LifecycleDGW updates, certificates, support and spares
DOWNLOADS
Brochures and technical documents
Download the PDF files directly. Use the documentation portal for configuration guides, installation procedures and release-specific information.
Products to compare
A starting point for your project. Review the model data sheet before ordering.
Sentinel Mini SBC
A compact SBC for a branch or a dedicated SIP edge.
- Selection criterion
- Required sessions, network ports, power supply and license.
Sentinel 400 SBC & Gateway
A modular voice edge for sites with mixed telephony interfaces.
- Selection criterion
- Interface modules, session license, power and resilience requirements.
Sentinel CS Virtual SBC
An SBC deployed on your virtual infrastructure.
- Selection criterion
- Supported hosting environment, CPU resources and licensed capacity.
SOLUTION BLUEPRINT
How Critical Infrastructure Communications changes the voice path.
The M5 layer sits between what must be preserved and the destination architecture, making security, translation and failure behavior explicit.
NO PUBLIC INTERNET REQUIRED
Private LAN / isolated IP network
Local phones, a local IP PBX, Mediatrix gateways and Sentinel can exchange SIP calls entirely inside the organization. The voice path can remain on a private LAN, VLAN, campus network or isolated operational network.
OPTIONAL FOR EXTERNAL SERVICES
SIP carrier, PSTN, Teams or cloud
An external connection is used only when calls must reach public numbers, remote sites or hosted services. If the required call path is entirely local, the system can stay on the private network.
LOCAL / ISOLATED OPERATIONAL NETWORK
Operational sites
Local users and systems require an explicit primary call path.
Dispatch / control
Operational communications need their own priority, security and recovery rules.
Safety devices
Legacy or safety endpoints remain isolated until compatibility is proven.
PRIVATE OPERATIONAL IP NETWORKLocal SIP signaling + RTP media
INTERNALSECURE + SURVIVABLE
Resilient M5 voice boundary
Sentinel, Mediatrix and DGW controls are selected around the actual communications dependency.
Site-local continuityApproved phones, gateways and call control can stay inside the site network. Internet is not inherently required for internal communications.
CONTROLLED EXTERNAL ROUTES
Cloud / central services
Central call control, Teams or management services connect through a protected route.
Carrier / public network
External reachability includes a tested alternate path where continuity requires it.
Primary routeLocal continuityEncrypted interconnectTested failover
READING THE DIAGRAM
What must remain available in critical infrastructure communications
- Operational sites
- The physical location, users and local equipment that depend on voice during normal operations.
- Dispatch / control
- The operational workflow—not just the telephone—that defines priority and recovery time.
- Sentinel SBC
- Secures and normalizes SIP between voice domains, controls media and routing, and hides the internal network.
- Mediatrix gateway
- Converts analog or digital voice interfaces into SIP/IP while preserving validated legacy equipment.
Reference flow — carrier, platform, jurisdiction and field requirements determine the production design.
BEFORE / AFTER
Turn an uncontrolled migration into an engineered transition.
Use these checkpoints to evaluate a critical infrastructure communications project before product selection or cutover.
The recommended design depends on the deployed carrier, PBX or UC platform, interfaces, call volume, failure modes and regulatory context.| Decision area | Uncontrolled approach | M5 architecture | Acceptance evidence |
|---|---|---|---|
| Interoperability | Assume systems will connect | Normalize signaling and media at a defined boundary | Documented end-to-end call tests |
| Security | Expose internal voice domains | Apply identity, topology and transport controls | Approved routes, certificates and logs |
| Continuity | Cut over every site together | Preserve required services and phase migration | Failover, rollback and exception tests |
| Operations | Treat go-live as the finish line | Assign monitoring, updates and escalation ownership | Runbook, backups and support entitlement |
FREQUENTLY ASKED
What to know before the next step.
Document every carrier, PBX or UC platform, endpoint class, site, interface, call flow, security boundary and failure requirement.
Yes. A phased architecture can preserve approved services while routes, sites and users move in controlled stages with rollback criteria.
Normal and exceptional calls, encryption, routing, media, failover, monitoring and operational ownership should all pass documented tests.
READY FOR THE NEXT STEP?Request a free review
Build the right voice architecture.
Share the product, deployment and target outcome. M5 will identify the right technical and commercial path.