The value of tSyncIfTimingAdmBITSOutAdmStatus specifies administrative status of the BITS (Building Integrated Timing Supply) output timing reference. In an XRS-40 system, tSyncIfTimingAdmBITSOutAdmStatus is always 'inService(2)', and cannot be changed. In an XRS-40 system, the extension chassis is synchronized with the master chassis via the BITS ports. See the description of tSyncIfTimingAdmBITSOutSource for details on how the BITS ports are used to synchronize the master and extension chassis of the XRS-40 system.