What Is D Channel?

Information About Technology

Core Definition

The D channel is an integral part of Integrated Services Digital Network (ISDN) systems. It functions as a dedicated channel that transmits signaling and control information, separate from the voice and data channels used for primary communication.

Benefit Definition

The D channel is responsible for setting up, managing, and breaking down calls within ISDN networks. It enables crucial features like Caller ID, Direct Inward Dialing (DID), call forwarding, and other advanced call control functions, ultimately streamlining communication efficiency.

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Technical Definition

The D channel’s bit rate depends on the type of ISDN interface. It operates at 16 kbit/s for Basic Rate Interfaces (BRI) and has a higher capacity of 64 kbit/s for Primary Rate Interfaces , enabling greater call management capabilities for larger systems.

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