This is a gauge reporting the highest characters-per-second throughput this node has achieved since its last reset. This peak figure is what an admin uses for capacity planning on this multiplexer, revealing the actual maximum sustained load the node has handled versus what its rated capacity theoretically allows, informing whether the node has headroom for additional terminal or trunk connections. For example, a peak of 9,500 characters per second on a node rated for 10,000 would indicate the node has already been pushed close to its throughput ceiling at some point.