What Does Integrated Services Digital Network (ISDN) Mean?
Integrated Services Digital Network (ISDN) is a set of communication standards for digital telephone connection and the transmission of voice and data over a digital line, and is a development of the plain old telephone service (POTS). These digital lines are commonly telephone lines and exchanges established by the government. They are used instead of the traditional circuits of the classic switched telephone network since they can integrate data and speech on the same line. Before ISDN, it was not possible for ordinary telephone lines to provide fast transmission over a single line.
Techopedia Explains Integrated Services Digital Network (ISDN)
ISDN can simultaneously transmit all kinds of data over a single telephone line. As such, voice and data are no longer separated as they were in earlier technologies, which used separate lines for different services. ISDN is a circuit-switched telephone network system, but it also allows access to packet-switched networks.
