This read-only object is the index identifying a specific entry in the TDMTG Network Clock configuration table, with the total number of entries bounded by the Maximum TDMTG Network Clock Entry parameter configured in the node record. Admins use it to distinguish between multiple clock table entries when reviewing each card's clock participation settings. A row with cdx6500TdmtgClkEntryNumber of 3 identifies the third entry in the TDMTG Network Clock configuration table, corresponding to a specific card's clock settings.