This attribute provides the count of the number of modems that are configured for this session. When the modems are explicitly configured via the management interface, this value remains static throughout the test. When the CCAP determines and manages the list of modems, this value can change over time as additional modems are assigned the OFDMA channel used for testing in their TCS at registration or via DBC, or as modems are administratively deleted from the system. In the case where additional modems are configured into a session by the CCAP, the modems are added to the end of the grant cycle as soon as is practical. Modems can be configured in a list but could be offline or in a state that does not allow them to be scheduled for OUDP Leakage Bursts. In these cases, the NumModemsCfg will be larger than NumModemsActive. Explicit modem MAC Address lists that are written via the management interface and modem MAC Address lists generated by CCAP are each a 'configured list'. Criteria for selecting the list of modems to configure is outside the scope of the specification. Explicit modem MAC Address lists can be specified in which a given modem appears multiple times. However, in all cases NumModemsCfg only counts each configured modem once.