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delivery confirmation bit (D-bit)

The D bit is a data field in the X.25 data packet used for end-to-end acknowledgement. The data terminal equipment (DTE) uses it to indicate whether it wishes to receive an end-to-end acknowledgement. The D bit is applied in data and CALL data packets and is set to "1" therein, in all other packet types the D bit = 0.

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Englisch: delivery confirmation bit - D-bit
Updated at: 20.04.2009
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