This counter tracks how many outbound Ethernet messages the LANCE controller had to truncate because data from memory arrived too slowly to keep up with transmission. An admin watching this value would treat a rising count as a sign the node's local memory or bus is too slow to feed the transmitter, which can show up as corrupted or short frames on the wire. For example, if this counter climbs steadily on a busy CNT node, it points to a memory-bandwidth bottleneck rather than a cabling or switch problem.