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Communications Programming Concepts

DLC8023 Connection Contention

Dual paths to the same nodes are detected by the IEEE 802.3 Etheret data link control (DLC8023) device manager in one of two ways. First, when a call in progress to a remote node also tries to call the local node, the incoming find (remote name) request is treated as if a local listen were outstanding. Second, when a pending local listen is acquired by a call from a remote node and the local user issues a call to the active remote node, a result code (DLC_REMOTE_CONN) is returned with the link station correlator of the active attachment, allowing the user to relink attachment pointers.


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