Description: Selects whether the interface will be used primarily as as timing provider for other interfaces on the same board. This object is applicable only if the interface supports reference locking, i.e. if the `ref' bit is set in itsIfCapabilities.

no(0). Used primarily as normal transport interface and secondarily as digital timing provider. Operational state is non-dormant and alarms are raised only when ingress or egress connection exists.

wordClock(1). Used primarily as 48 kHz word clock timing provider. Neither ingress nor egress connections are allowed. Operational state is non-dormant and alarms can be raised if needed.