| Description | An value that identifies the primary reference source that
the network clock available from this source is traceable
to if configured as a source of network clock for NCDP.
(See American National Standards Institute, ANSI T1.101,
'Synchronization Interface for Digital Networks' and Bell
Communications Research, GR-436-CORE, 'Digital Network
Synchronization Plan' for more detailed information
regarding Primary Reference Sources.). If a source of
network clock is an onboard oscillator local to the device
it is 'internal' otherwise it is 'external'. If the value
of this object is used as a tiebreaker by the NCDP
algorithm,'external' wins over 'internal'.
All 'external' sources of network clock are assumed to be
traceable to the same PRS by the NCDP protocol entity. |