Session Border Controllers

Best Session Border Controllers include:

Cisco Unified Border Element (CUBE), AudioCodes Mediant Enterprise Session Border Controllers (E-SBCs), Ribbon Session Border Controller (SBC), RedShift UCTM, AudioCodes Mediant Virtual Edition (VE), Perimeta Session Border Controller (SBC), Enghouse BorderNet SBC, Cisco Session Border Controller and Ingate SIParator.

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Avaya Aura

The on-premises Avaya Aura Platform delivers unified communications and customer service solutions, designed to enhance employee and customer experiences. It is presented as real time communications architecture using session-based collaboration technologies, and is used to enable…

Cisco Unified Border Element (CUBE)

The Cisco Unified Border Element (CUBE) is a session border controller, which provides session control, security, interworking, and demarcation. CUBE is a software product available for licensing on the Cisco IOS® and Cisco IOS XE Software which runs on Cisco enterprise routers, but…

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AudioCodes Mediant Enterprise Session Border Controllers (E-SBCs)

Israeli company AudioCodes offers a the Mediant line of enterprise session border controllers (E-SBC), presently available as appliances in the Mediant 9000, 4000, 2600, 1000, 800, 500 series editions.

REVE Session Border Controller

REVE Session Border Controller is an enterprise solution that provides carrier grade scalability, security with high performance. REVE SBC provides robust network security under heavy loads & DoS attacks with distributed architecture for network availability & resiliency…

OpenTouch Session Border Controller

Alcatel-Lucent offers the OpenTouch Session Border Controller.

EdgeMarc Intelligent Edge

The EdgeMarc Intelligent Edge are session border controllers developed by Edgewater Networks in San Jose, California, now owned and supported by Ribbon Communications since the company's acquisition of Edgewater Networks.

Atos Unify OpenScape Session Border Controller

Atos Unify offers the OpenScape Session Border Controller.

Enghouse BorderNet SBC

Enghouse BorderNet SBC replaces the former Dialogic session border controller, that was acquired by Enghouse. It is presented as a single software elastic SBC with high availability (HA) deployments in Amazon Web Services (AWS) and Microsoft Azure clouds, as well as on leading hypervisors…

Sangoma Session Border Controllers (SBCs)
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Sangoma provides VoIP security via their line of session border controllers, providing editions for SMBs, Enterprises, and the high volume Netborder appliance supporting up to simultaneous 4000 calls. And the Sangoma Virtual Machine SBC is available as a software only solution, securing…

Cisco Session Border Controller
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Cisco provides a session border controller.

RedShift UCTM
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The RedShift Networks suite of Unified Communications Threat Management (UCTM) products offer communication service providers (CSPs) the a cyber security solution for SIP-enabled services (e.g. VoIP, Mobile, Cable, Wholesale, UC Cloud).

Ribbon Session Border Controller (SBC)

Ribbon Communications headquartered in Westford offers Session Border Controllers (SBC) for large enterprises and SMBs.

AudioCodes Mediant Virtual Edition (VE)

AudioCodes Mediant Virtual Edition (VE) is a scalable solution supporting SIP interoperability, media handling (including transcoding) and security. It provides full SBC functionality for enterprises and service providers looking to deliver voice services such as hosted business…

Learn More About Session Border Controllers

What is a Session Border Controller?

A Session Border Controller (SBC) is a device used to regulate and protect IP communications flows. They are typically deployed at both the network edge and at carrier interconnects, or the border between their users and other service providers.

An SBC’s main function is to manipulate IP communications signaling and media streams. It secures the main SIP network and application servers, and providers client/server interworking as it acts as a back-to-back user agent.

Functionalities include:

Security- protection against Denial of Service (DoS) and Distributed DoS (DDoS) attacks, media and signaling encryption, protection against service theft and toll fraud.

Session routing- routes sessions across network interfaces. This ensures the least cost routing.

Protocol interworking- interconnection between various different protocols and codecs, like SIP to H.323 – or g.711 to g.729.

Multivendor interoperability- regulate multivendor incompatibilities by standardizing messages and signaling stream headers.

Quality of Service (QoS)- implement call admission (or denial) policies, Type of Service (ToS) marking, or rate-limiting for service quality assurance.

Features and Capabilities

  • Normalizing Session Initiation Protocol (SIP)
  • Media transcoding
  • Bandwidth restrictions
  • Security
  • Session routing
  • Protocol interworking
  • Multivendor interoperability
  • Quality of Service (QoS)
  • Traffic policing.
  • Resource allocation.
  • Rate limiting.
  • Call admission control.
  • ToS/DSCP bit setting.


Performance under real-world network traffic loads- SBCs are expected to perform under real-world network traffic loads however consider your enterprise and the mix of traffic it receives daily. Best way to check is to deploy it in a live environment that mimics your enterprise’s traffic to see how well it handles the network load.

Security- SBCs come with a variety of security protocols but many vendors offer them in variants. Check what is being offered to ensure it suits your business needs.

Other businesses using VoIP Phone Systems- This can be especially helpful to startups and smaller business models needing to decide how relevant this is for the business. Look at the types of business using SBCs and how they are being implemented.


Some SBCs are priced at anywhere from $300 to as much as $55,000. For accurate pricing, the rule of thumb is to contact the vendor to receive a direct quote for services you would like rendered. As mentioned above, there are some features or functions that come standard, like security, but the specificities may vary, eg: the features present for Fraud Detection and Monitoring.

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Frequently Asked Questions

What are the functions of a Session Border Controller?

Session Border Controller manages and regulates the IP communication flows in a VoIP network. They provide Security, Session routing, Protocol interworking, Multivendor interoperability and Quality of Service (QoS).

Are SBCs relevant for a Communication Business?

Absolutely! It is necessary to protect your real-time communication network from various types of VoIP -based cyber-attacks. It also allows you to monitor performance reports on live calls and provides real-time billing with intelligent routing.

Does SBC support Fraud Detection and Monitoring?

Yes, the security functionality has systems in place to prevent/support Fraud Detection and Monitoring. Some features in place include Topology Hiding, Dynamic Pinholing, Media & Signalling Encryption, and List Monitoring. These are common features, which may vary depending on the vendor.

How does SBC Protect Against Denial-of-Service (DOS) Attacks?

SBC employs methods such as Dynamic Firewall Management, Bandwidth Management, Call Rate Limiting, and Line Rate Speed Processing to protect against such attacks.