Sangoma Session Border Controllers

The Right Way to Protect your VoIP Environment

A Session Border Controller (SBC) will allow you to connect your remote workers and SIP trunk(s) securely to your phone system without compromising security, automatically detecting VoIP threats and taking action. 

Additionally, Sangoma SBCs  can automatically translate codecs and audio with built-in interoperability and transcoding capabilities.

Sangoma SBC
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Businesses with legacy phone systems can install a Vega gateway to seamlessly connect to VoIP services or a SIP trunk and eliminate the PSTN connection.

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Business Continuity

Maintain essential services while transitioning between phone systems or SIP trunks, or due to catastrophic scenarios.

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Ensure compatibility between VoIP carriers and endpoints.

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Remote Connectivity

Securely connect remote users to the corporate phone system without requiring a VPN.

Have questions? Not sure which SBC is right for you?
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Small to Medium Business SBC
5-30 simultaneous calls

Enterprise SBC

Medium to Large Business SBC
25-250 simultaneous calls

Netborder SBC

Large Business SBC
250-4000 simultaneous calls

When Would You Use a Session Border Controller?

Remote Workers

Connect remote workers to the corporate phone system without opening up ports in the firewall. The SBC monitors all the traffic for any malicious registrations or threats and takes immediate action.

Cloud Phone Systems

In a hosted environment, enterprises rely on the service provider for all their phone system services. An SBC protects their networks while managing any interoperability issues.

SIP Trunking

Service providers can use an SBC to not only protect their network but also introduce new revenue streams by providing SIP services to customers using legacy PSTN equipment.


SBCs provide protection against malicious attacks such as Denial-of-Service, toll fraud, and SIP/RTP flooding, while hiding network topology to keep network routes unexposed.

Session Border Controller Features

VoIP Protection

Protects VoIP networks from malicious attacks.

Call Routing

Provide low-cost routing and load balancing across trunks.

Call Limiting

Limit the amount of traffic through call paths to ensure quality of service and mitigate risk of toll fraud.

Simplified Licensing

All SBCs are field upgradable and licensing is per session-based, meaning all the features are always included.

Media Transcoding

Generate the best quality of service the connection can provide, from HD voice quality to small bandwidth optimized codecs.

Flexible Routing

Advanced flexible call routing with automatic failover and bypass routing.

Advanced Troubleshooting

Built-in call tracing and debugging utilities.

Hardware Redundancy

Ensure business continuity during catastrophic hardware failures by mirroring two SBCs together.

Gateway Specifications


Max Call / Sessions
4000 – NetBorder SBC
1000 – VM SBC
250 – Enterprise SBC
30 – SMB SBC
Unlimited SIP trunks
Max. 120 TDM-SIP calls/sessions *Applicable only to Enterprise SBC
Full security (SRTP/TLS) capability
Full Transcoding Capability


SIP 2.0 compliant
SIP intrusion prevention
SIP trunking and remote working
SIP registration pass-thru
SIP malformed packet protection
Topology hiding
ENUM routing
SIP request rate limiting
SIP friendly load limitation
SIP header normalization Advanced NAT traversal capabilities


10/100/1000 BaseT Ethernet ports
6x – NetBorder SBC
3x – Enterprise SBC
4x – SMB SBC
VLAN support
1x VGA port (Enterprise and NetBorder appliances)
1x console port (NetBorder appliance)


DDoS / DoS attack protection
Media security with SRTP
DDoS / DoS attack protection
IPSec encryption
IP firewall with port forwarding
Call security with TLS/SRTP
Two-stage authentication

Session and Monitoring

Multiple session routing options
RTCP statistics reports
QoS (ToS or DSCP)
RADIUS CDR and authentication
QoS monitoring and reporting

Session and Monitoring

Easy-to-use web interface
Real-time monitoring and debugging
TR-069 for remote provisioning
REST based interface to remotely configure SBCs