01
Legacy dependencies
Analog, PBX and field systems remain operationally necessary during modernization.
Critical Infrastructure Communications
Keep essential operations connected when communications cannot fail.
M5 Technologies helps airports, utilities, rail operators, government, defense, ports, oil and gas, and smart cities secure SIP infrastructure, preserve legacy systems, integrate Microsoft Teams and build resilient emergency voice architecture.
Operational continuityProtect dispatch, control rooms, field teams and emergency voice.
SIP edge securityControl trunks, peers, routes and topology exposure.
Legacy modernizationPreserve analog, PBX and operational systems during migration.
Resilient architecturePlan redundancy, failover and disaster-recovery voice paths.
How the communications problem is resolvedOperational systems → M5 control layer → resilient services
Mission-critical architecture
Critical operations
Control roomsField teamsEmergency phonesDispatchFacilities
↓
M5 secure communications layer
Sentinel SBCMediatrix gatewaysDGWSIP policyTeams integration
↓
Communications services
SIP carriersPBXMicrosoft TeamsNG911Backup sites
ContinuityPriority calls remain available.
SecuritySIP exposure is controlled.
ModernizationChange is phased and testable.
Airports & portsOperations, terminals, security and emergency communications.
Rail & transitStations, tunnels, dispatch and control-room continuity.
Utilities & energySubstations, plants, field operations and service restoration.
Government & defenseSecure, accountable and resilient voice infrastructure.
Smart citiesConnected urban services, emergency systems and distributed sites.
The customer problem
Critical infrastructure depends on communications across systems that were never designed to operate as one.
Operators must connect legacy PBXs, analog endpoints, SIP trunks, Teams, emergency services, carriers and distributed sites without creating new security or continuity gaps.
02
SIP exposure
External trunks and shared networks create signaling and topology risk.
03
Continuity gaps
Carrier, site, cloud or equipment failures can remove critical calling paths.
04
Fragmented operations
Routing, ownership, logging and recovery processes are spread across platforms.
Customer impact: without a controlled communications layer, outages, cyber incidents and migrations can disrupt public safety, operations, dispatch and service restoration.
How M5 resolves the use case
Create one secure control layer between field systems, voice platforms and carriers.
M5 separates legacy interworking, SIP security and resilience so each part of the environment can be governed and modernized without a disruptive replacement program.
Preserve operational systems
Mediatrix gateways connect analog, PBX and facility voice systems to modern SIP infrastructure.
- Analog and digital interworking
- Emergency endpoint continuity
- Phased migration by site
Secure the voice edge
Sentinel SBCs control signaling, routes, peers, topology and external interconnections.
- Topology hiding and normalization
- Routing and access policy
- TLS/SRTP where supported
Design for continuity
Redundant SBCs, gateways, carriers and recovery sites support defined failover paths.
- High availability and redundancy
- Alternate routing
- Disaster-recovery validation
Operational users & systemsControl rooms, dispatch, field and emergency endpoints
→
Mediatrix gatewayLegacy, analog and PBX interworking
→
Sentinel SBCSIP security, policy and routing control
→
Critical voice coreTeams, PBX, carriers, NG911 and recovery sites
Sector use cases
Apply the architecture to the operational reality of each sector.
Airport operations
ProblemTerminals, security, maintenance and emergency services depend on mixed systems.
M5 approachSBC-controlled SIP, gateway interworking and Teams integration.
ObjectiveMaintain coordinated operations across the airport estate.
Rail and transit
ProblemStations, tunnels, dispatch and control rooms require reliable distributed voice.
M5 approachLocal gateways, secure SIP and centralized routing policy.
ObjectiveImprove continuity and control across transport networks.
Utility communications
ProblemSubstations, plants and field sites rely on remote and legacy communications.
M5 approachGateway modernization, survivability and redundant voice paths.
ObjectiveSupport operations and service restoration during disruption.
Government & public safety
ProblemAgencies and facilities require secure, accountable and interoperable voice.
M5 approachSBC policy, Teams/PBX coexistence and documented architecture.
ObjectiveReduce fragmentation and improve emergency readiness.
Defense environments
ProblemSecure facilities and distributed sites require resilient communications boundaries.
M5 approachOn-premise or virtual SBC, gateway coexistence and controlled interconnection.
ObjectiveModernize while preserving mission-critical workflows.
Oil, gas & industrial sites
ProblemRemote facilities, control rooms and emergency endpoints depend on robust voice.
M5 approachLocal gateways, SIP security and alternate communications paths.
ObjectiveImprove operational continuity in distributed industrial environments.
M5 solution portfolio
Platforms for edge, enterprise, virtual and embedded communications.
Sentinel CSVirtual SBC for scalable, centralized and hybrid critical communications.
Sentinel 400Enterprise SBC and media gateway for mixed voice environments.
Sentinel 100Secure SIP demarcation for enterprise and distributed sites.
Sentinel MiniCompact SBC for smaller facilities and edge deployments.
Mediatrix 4102Analog migration for emergency phones and distributed endpoints.
C7 / G7 / S7Gateway options for analog, PRI, BRI, PBX and facility voice.
DGW SoftwareConfiguration, SIP capabilities and lifecycle management.
M5T SIP SDKEmbedded SIP and real-time communications for OEM platforms.
Modernization roadmap
Move from fragmented systems to a controlled communications architecture.
1
Assess
Map sites, users, carriers, trunks, PBXs, analog devices and emergency paths.
2
Prioritize
Identify life-safety, operational, regulated and high-risk communications.
3
Design
Define SBC placement, gateway roles, routing, security and redundancy.
4
Validate
Test interoperability, failover, emergency calling and recovery procedures.
5
Deploy
Roll out by site or service with controlled change and rollback plans.
Expected outcomes
What the architecture is designed to improve.
Results depend on the final carrier, platform and operational design.
Continuity of operationsPriority voice paths remain available during defined failure scenarios.
Controlled SIP exposureExternal interconnections are governed by explicit policy.
Lower modernization riskLegacy and modern systems coexist during phased migration.
Better operational visibilityRouting, ownership, logging and lifecycle responsibilities become clearer.
FAQ
Questions infrastructure, IT and operations teams commonly ask.
What are critical infrastructure communications?
They are voice, SIP, emergency and operational communications that support essential services, public safety, dispatch, field teams and continuity.
Why is an SBC important?
An SBC controls SIP interconnection, routing, topology, normalization and security between trusted systems and external networks.
Can legacy systems remain during modernization?
Yes. Mediatrix gateways can preserve selected analog, PBX and facility systems while the target IP architecture is introduced in stages.
Can M5 support Microsoft Teams?
Yes. Sentinel SBCs support Teams Direct Routing and can connect Teams with carriers, PBXs and operational voice systems.
How is disaster recovery addressed?
Architecture can include redundant SBCs, alternate carriers, recovery sites, failover routes and documented validation procedures.
What is the first step?
Start with an inventory of sites, trunks, platforms, emergency endpoints, critical call paths and continuity requirements.
Critical infrastructure review
Map communications risk before the next outage, incident or modernization project.
Provide a high-level overview of the environment. M5 can help identify the SBC, gateway, interoperability, emergency-calling and continuity questions that should be resolved.
- Sites, facilities, control rooms and field operations
- SIP trunks, carriers, PBXs and Microsoft Teams
- Analog devices, emergency phones and legacy systems
- High availability, redundancy and disaster recovery
- Cybersecurity, routing and interoperability requirements