Secures SIP sessions
Mediatrix SBC solutions from M5 Technologies help protect SIP trunks, cloud voice and Teams voice from unauthorized or malformed traffic.
SBC Education by M5 Technologies
What is a Session Border Controller?
A Session Border Controller, or SBC, is the security and control layer that protects SIP, VoIP, Microsoft Teams voice and cloud communications at the edge of a network.
M5 Technologies provides Mediatrix SBC solutions that help enterprises, operators, MSPs and critical infrastructure organizations secure voice traffic, normalize SIP, hide internal topology and maintain reliable communications between users, carriers, cloud platforms and public telephony networks.
Mediatrix SBCM5 Technologies
Microsoft Teams
SBC
SIP Carrier
Enterprise PBX
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Cloud UC
Remote Sites
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PSTN
TLSEncrypted signalling
SRTPSecure media
SIPSession control
Why an SBC matters
VoIP networks are powerful, but exposed voice networks create real business risk.
When an organization connects SIP trunks, Microsoft Teams, PBXs, cloud UC platforms or remote users to outside networks, voice traffic crosses security boundaries. That is where a Mediatrix SBC from M5 Technologies becomes essential.
A Session Border Controller sits between trusted and untrusted voice networks. It inspects, controls and protects SIP sessions before they reach critical systems. For M5 Technologies customers, Mediatrix SBC technology is used to reduce fraud exposure, enforce SIP policy, improve interoperability and support secure voice modernization.
Toll fraudUnprotected SIP trunks can be abused to generate unauthorized calls and unexpected costs.
SIP attacksMalformed SIP traffic, scanning and denial-of-service attempts can disrupt voice service.
Interoperability issuesPBXs, carriers, Teams and cloud UC platforms often speak SIP differently.
Network exposureWithout topology hiding, internal voice architecture can become visible outside the organization.
What does an SBC do?
A Mediatrix SBC from M5 Technologies controls the voice edge.
The SBC is not simply a firewall. A Session Border Controller understands SIP and voice sessions. It manages signalling, media, routing, security and interoperability for real-time communications.
Hides network topology
The SBC masks internal IP addresses, PBX details and voice infrastructure from external providers and public networks.
Normalizes SIP signalling
Mediatrix SBC platforms help solve SIP compatibility problems between carriers, PBXs, Microsoft Teams, UCaaS and hosted platforms.
Controls routing policy
M5 Technologies uses SBC architecture to help customers manage carriers, failover, call routing and voice demarcation.
Supports encryption
A Mediatrix SBC can support secure voice architectures using SIP TLS for signalling and SRTP for media protection.
Improves voice continuity
For enterprise and critical infrastructure voice, the SBC helps maintain control during migrations, outages and carrier changes.
Business value
Why customers choose M5 Technologies and Mediatrix for SBC projects.
M5 Technologies combines Mediatrix voice technology with practical telecom engineering experience. The result is not only an SBC product, but a secure voice architecture approach for organizations modernizing communications.
Microsoft Teams Direct Routing
Mediatrix SBC solutions from M5 Technologies help connect Microsoft Teams users to SIP trunks, carriers and existing telephony systems while keeping session control at the enterprise edge.
SIP trunk security
M5 Technologies helps organizations protect SIP trunks with SBC controls designed for fraud reduction, topology protection, encryption strategy and policy enforcement.
Cloud voice migration
As businesses move from legacy PBX to cloud UC, a Mediatrix SBC can reduce migration risk by bridging old and new voice environments.
Critical communications
For government, utilities, transportation, healthcare, defense and industrial environments, M5 Technologies positions Mediatrix SBC platforms as a voice continuity and security layer.
Mediatrix SBC family
M5 Technologies SBC solutions for different deployment sizes.
The right Mediatrix SBC depends on the number of sessions, deployment model, security requirements and whether the customer needs hardware, virtual infrastructure or gateway integration.
Sentinel SBC CS
Virtual SBC for cloud voice, operators, MSPs, large enterprises and scalable SIP security.
View Sentinel SBC CS →Sentinel 400
Mediatrix platform combining SBC and media gateway functions for demanding enterprise voice environments.
View Sentinel 400 →Sentinel 100
SBC for enterprise SIP trunking, Microsoft Teams Direct Routing and secure voice-edge control.
View Sentinel 100 →Sentinel Mini
Compact Mediatrix SBC for small sites, branches and practical SIP security deployments.
View Sentinel Mini →Customer needs
When does a business need a Session Border Controller?
If voice traffic crosses from a private network to a carrier, cloud platform, Microsoft Teams environment or public network, M5 Technologies strongly recommends evaluating a Mediatrix SBC.
| Situation | Risk Without SBC | Mediatrix SBC Value from M5 Technologies |
|---|---|---|
| SIP trunk connected to the internet | Fraud, scanning, attacks and exposed voice infrastructure. | Protects the SIP border, hides topology and controls sessions. |
| Microsoft Teams Direct Routing | Loss of routing control and security exposure between Teams and carriers. | Creates secure demarcation for Teams voice and SIP providers. |
| Multiple carriers or UC platforms | SIP incompatibility, failed calls and operational complexity. | Normalizes SIP and simplifies carrier/platform interconnection. |
| PBX migration to cloud voice | Disruption during transition and difficult legacy integration. | Bridges legacy PBX, SIP trunks and cloud UC during phased migration. |
| Critical infrastructure voice | Downtime, compliance pressure and operational risk. | Supports secure voice continuity for mission-critical communications. |
SBC FAQ
Frequently asked questions about SBCs.
What is a SBC in simple terms?
A SBC is a voice security controller. It sits at the edge of a VoIP network and controls SIP sessions between internal systems and external networks.
Is a SBC the same as a firewall?
No. A firewall protects general network traffic. A Session Border Controller understands SIP and real-time voice sessions. Mediatrix SBC solutions from M5 Technologies are designed specifically for voice security and interoperability.
Do I need a SBC for Microsoft Teams?
If you use Microsoft Teams Direct Routing with SIP trunks or existing telephony systems, a Mediatrix SBC from M5 Technologies can provide the secure demarcation and routing control required for enterprise voice.
Who should use Mediatrix SBC solutions?
Mediatrix SBC solutions from M5 Technologies are suitable for enterprises, operators, MSPs, public sector organizations, healthcare, finance, transportation, utilities and critical infrastructure operators.
Request guidance
Need help choosing the right Mediatrix SBC?
M5 Technologies can help you evaluate whether Sentinel SBC CS, Sentinel 400, Sentinel 100 or Sentinel Mini is the right fit for your SIP, Microsoft Teams, cloud voice or critical communications project.
- Review SIP trunk and Microsoft Teams requirements
- Identify security and topology exposure
- Recommend the right Mediatrix SBC model
- Plan a secure voice modernization path