This configures the protocol identifier value stamped into CCRM (congestion control and resource management) cells generated by the NRTS scheduler. Because the description explicitly requires this to differ from cardNrtsBcmProtocolId, an admin who sets both to the same value creates ambiguous cell tagging that could cause the NRTS logic to misclassify CCRM and BCM cells against each other, undermining the rate and congestion management these cells exist to support. For example, an admin changing this from the default of 6 must simultaneously confirm cardNrtsBcmProtocolId still holds a different value, or the two cell types become indistinguishable to the NRTS processor.