We are independent & ad-supported. We may earn a commission for purchases made through our links.
Advertiser Disclosure
Our website is an independent, advertising-supported platform. We provide our content free of charge to our readers, and to keep it that way, we rely on revenue generated through advertisements and affiliate partnerships. This means that when you click on certain links on our site and make a purchase, we may earn a commission. Learn more.
How We Make Money
We sustain our operations through affiliate commissions and advertising. If you click on an affiliate link and make a purchase, we may receive a commission from the merchant at no additional cost to you. We also display advertisements on our website, which help generate revenue to support our work and keep our content free for readers. Our editorial team operates independently of our advertising and affiliate partnerships to ensure that our content remains unbiased and focused on providing you with the best information and recommendations based on thorough research and honest evaluations. To remain transparent, we’ve provided a list of our current affiliate partners here.

What is a Session Border Controller?

M. McGee
By
Updated May 16, 2024
Our promise to you
EasyTechJunkie is dedicated to creating trustworthy, high-quality content that always prioritizes transparency, integrity, and inclusivity above all else. Our ensure that our content creation and review process includes rigorous fact-checking, evidence-based, and continual updates to ensure accuracy and reliability.

Our Promise to you

Founded in 2002, our company has been a trusted resource for readers seeking informative and engaging content. Our dedication to quality remains unwavering—and will never change. We follow a strict editorial policy, ensuring that our content is authored by highly qualified professionals and edited by subject matter experts. This guarantees that everything we publish is objective, accurate, and trustworthy.

Over the years, we've refined our approach to cover a wide range of topics, providing readers with reliable and practical advice to enhance their knowledge and skills. That's why millions of readers turn to us each year. Join us in celebrating the joy of learning, guided by standards you can trust.

Editorial Standards

At EasyTechJunkie, we are committed to creating content that you can trust. Our editorial process is designed to ensure that every piece of content we publish is accurate, reliable, and informative.

Our team of experienced writers and editors follows a strict set of guidelines to ensure the highest quality content. We conduct thorough research, fact-check all information, and rely on credible sources to back up our claims. Our content is reviewed by subject-matter experts to ensure accuracy and clarity.

We believe in transparency and maintain editorial independence from our advertisers. Our team does not receive direct compensation from advertisers, allowing us to create unbiased content that prioritizes your interests.

A session border controller (SBC) is the computer system that controls Voice over Internet Protocol (VoIP), video conferencing and other common personal media connections. The SBC has a great deal of influence, as it governs everything from call quality to security and monitors communication processes for regulatory systems. The control exerted by the session border controller system has caused significant controversy between various telecommunication watchdog groups.

The term ‘session border controller’ is made up of three fundamental concepts in Internet-based communication. A session refers to the actual communication process from when the first user dials until the last user disconnects. The border, in this case, refers to any point where one network ends and another begins. Lastly, a controller is an overseer program that monitors a session and makes changes to the system based on the call’s requirements.

In the past, the session border controller system was only responsible for negotiating borders between non-trusting networks. As Internet communication became more common, that began to change. Now, the SBC governs most aspects of communication sessions, both in terms of time and network usage.

Negotiating between systems is still one of the session border controller’s main duties. As communication moves over networks, it needs to comply with that network’s standards. The SBC finds out what those specifications are and routs calls appropriately. This allows the session to avoid problematic systems or work out arrangements in advance.

Security and quality are two other prominent areas of a session border controller’s job. While the session is active, the controller is constantly looking for intrusions in or out of the call. They also protect the systems connected to the session, whether they are participants or carriers, from service attacks and malicious activity. In addition, the SBC monitors call quality and takes steps to rectify quality problems as they occur.

An SBC is also part of the communication regulatory system. A session border controller needs to prioritize emergency calls, just like a standard phone system. They also need to have monitoring capabilities, should law enforcement require such information. Lastly, they monitor the call's length and resource usage for potential billing.

The all-encompassing nature of the session border controller has caused its share of problems. The main one relates to the parties that should be involved in Internet-based communication. The two camps sit on opposite sides of the issue, with very little common ground. One side believes that sessions should only be between the participants in that session. The other side believes that service providers need to keep involved in sessions in order to protect their bandwidth and resource usage.

EasyTechJunkie is dedicated to providing accurate and trustworthy information. We carefully select reputable sources and employ a rigorous fact-checking process to maintain the highest standards. To learn more about our commitment to accuracy, read our editorial process.
M. McGee
By M. McGee
Mark McGee is a skilled writer and communicator who excels in crafting content that resonates with diverse audiences. With a background in communication-related fields, he brings strong organizational and interpersonal skills to his writing, ensuring that his work is both informative and engaging.
Discussion Comments
M. McGee
M. McGee
Mark McGee is a skilled writer and communicator who excels in crafting content that resonates with diverse audiences....
Learn more
EasyTechJunkie, in your inbox

Our latest articles, guides, and more, delivered daily.

EasyTechJunkie, in your inbox

Our latest articles, guides, and more, delivered daily.