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D-Channel

Webopedia Staff
Webopedia Staff
Updated on:
Short for Delta-channel, the channel in an ISDN connection that carries control and signaling information. Basic Rate ISDN (BRI) service consists of two 64 Kbps B-channels, and one D-channel for transmitting control information. Primary ISDN service consists of 23 B-channels (in the U.S.) or 30 B-channels (in Europe).

Compare with B-channel.

Webopedia Staff
Webopedia Staff
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