ISDN

ISDN (Integrated Services Digital Network) is a technology that allows voice, data, and video to be transmitted over phone lines at the same time. Unlike traditional phone lines that only carry voice, ISDN enables digital communication, providing faster and more reliable connections. It works by converting analog signals to digital, which can be used by computers, phones, and other devices simultaneously through dedicated channels. Although once popular for business and internet access, ISDN has been largely replaced by faster broadband options today. It's known for its quality and efficiency in handling multiple types of digital communication over the existing phone infrastructure.