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Difference Between ISDN BRI and PRI

Difference Between ISDN BRI and PRI

ISDN BRI and PRI are two different types of digital lines used for voice and data transmission. They each have their own unique features, which can make them a better choice for some businesses than others. In this blog post, we’ll compare and contrast these two types of digital lines to help you decide which one is right for you.

What is ISDN BRI?

ISDN BRI, or basic Rate Interface, is the most commonly used ISDN technology. It provides two 64 kbps B channels and one 16 kbps D channel for transmitting digital data. The D channel can be used for signaling and control purposes, while the B channels are used for user data. ISDN BRI is typically used by small businesses and home users who need a reliable and affordable way to connect to the internet. ISDN BRI also offers voice-over-IP (VoIP) capabilities, making it a popular choice for VoIP users. ISDN BRI is available in many different countries, making it a global standard for ISDN connectivity.

What is ISDN PRI?

ISDN PRI (Primary Rate Interface) is a digital telephone line used by businesses and organizations that need high-speed, reliable communications. ISDN PRI offers many advantages over traditional analog lines, including higher data rates, lower costs, and easier installation and maintenance. ISDN PRI is the most popular type of ISDN service and is available in most countries.

Difference Between ISDN BRI and PRI

There are two main types of ISDN service: ISDN BRI and ISDN PRI. ISDN BRI is designed for smaller businesses and home users, while ISDN PRI is intended for larger businesses with heavier demand. ISDN BRI typically provides two 64 kbps data channels and one 16 kbps voice channel, while ISDN PRI typically provides 23 64 kbps data channels and one 64 kbps voice channel. ISDN PRI also offers additional features such as Caller ID and vertical blanking interval data signaling, which are not available with ISDN BRI. As a result, ISDN PRI is generally more expensive than ISDN BRI. However, the higher cost may be worth it for businesses that need the extra features and capabilities.


The main difference between an ISDN BRI and PRI is that a PRI can support up to 23 simultaneous phone calls, while an ISDN BRI supports just two. If you are looking for a telephone line with more capacity, then you will need to go with a PRI. However, if your needs are limited, then an ISDN BRI may be the better option for you.

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