This object specifies the clock mode for a High-Speed Frame (HSF) port on a RAD device, selecting between DCE (data communications equipment, provides clocking), DTE (data terminal equipment, receives clocking), external DCE (clocking from an external source), or no clock mode. The setting determines whether the port acts as a clock source or consumer, critical for maintaining synchronized communication in serial link connections. Telecommunications engineers configure this mode when establishing point-to-point connections to ensure both sides agree on clock timing.