This is the low-priority counterpart to cat2600TsPortHPChannelFrames, counting frames sent to this Token-Ring port's low-priority channel -- the bulk of ordinary traffic that didn't meet the priority threshold. An admin uses the ratio between this and the high-priority count to confirm the priority-based queuing scheme (governed by cat2600TsPortHPThreshold) is actually separating traffic classes as intended rather than dumping everything into one channel. A port where nearly all frames land in the low-priority channel despite priority traffic being expected suggests a misconfigured threshold or untagged priority bits upstream.