This reports the configured size, in cells, of the QoS output queue on each port of this card, either 8K or 24K cells. A larger queue size absorbs bigger traffic bursts before discarding but at the cost of higher worst-case latency for delay-sensitive traffic, so an admin choosing between these two values is directly trading burst tolerance against jitter and latency guarantees for real-time services like voice over this card's ports. For example, a card carrying primarily CBR voice traffic might be intentionally kept at the smaller cell-8K(1) queue size to bound latency, while a data-heavy card is set to cell-24K(2) to better absorb bursts.