ISDN

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ISDN

Integrated services digital network. A long-obsolete digital telecommunications line with a data (text, graphics, video and audio) throughput of up to 128 kps.

ISDN

Integrated services digital network Informatics A digital telecommunications line with a data–text, graphics, video and audio–throughput of up to 128 kps. See Internet, Local area network, Modem.
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It uses two types of standard channels: Bearer channels, which carry the user's voice, data, image and sound traffic; and Data channels, which carry the call set-up and signaling information.
A considerable amount of messaging, both text and instant messaging, is carried over 2G bearer channels.
In ISDN systems, 64 Kbps circuit-switched bearer channels (B channels) carry both voice and data.