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High-Level Data Link Control
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====Receive Not Ready (RNR)==== * Bit value = 01 (0x04 to match above table type field bit order<ref>{{Cite web|url=http://www.euclideanspace.com/coms/protocol/x25/link/f_types/index.htm#rnr|title = X.25 frame types - Martin Baker}}</ref>) * Acknowledge some packets but request no more be sent until further notice. * Can be used like RR with P bit set to solicit the status of a secondary station * Can be used like RR with F bit set to respond to a poll if the station is busy.
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