Integrated Services Digital Network (ISDN)

Integrated Services Digital Network (ISDN) is a communication system that allows the simultaneous transmission of voice, data, and video over traditional telephone lines. It integrates multiple types of digital services into a unified network, enabling faster and more reliable connections compared to older analog systems. ISDN uses digital channels to efficiently transfer information, making it useful for businesses and organizations needing real-time data, voice, or video communication. While less common today due to newer technologies like broadband, ISDN was once a key method for providing high-quality digital communication over existing telephone infrastructure.