International Service DIGITAL Network (ISDN) is a telecommunications network that enables the transmission of digital voice, video, and data services over the traditional telephone network. It is an international standard for digital transmission of data and voice services, offering improved quality and capabilities over traditional analog telephony.
ISDN provides a circuit-switched network that utilizes digital signals rather than analog signals for carrying voice and data communications. It allows for the integration of different services such as voice, video, and data transmission on a single network, providing users with a versatile and efficient platform for communication.
One key feature of ISDN is its ability to offer multiple channels or lines simultaneously, allowing for concurrent transmission and reception of different communication services. It supports two basic channel types: B channels and D channels. B channels are used for data and voice transmission and can be aggregated to increase bandwidth, while D channels are used for signaling and control purposes.
ISDN offers various services, including voice calls, fax transmission, video conferencing, and high-speed data transfer. It provides enhanced call quality, reduced transmission delays, and improved reliability compared to analog networks. ISDN is also compatible with existing analog telephone systems, enabling a smooth transition to digital communication.
Overall, ISDN is an international telecommunications network that provides digital voice, video, and data services, offering improved quality and versatility over traditional analog systems.
