Meinberg LANTIME, Operating Instructions Manual

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If one or more additional LANTIME NTP servers are available on the network then
clients which have been configured to use all of them will automatically discard the
LANTIME with the bad stratum and synchronize to another NTP server which is
operating correctly at a better stratum. If no redundant LANTIME is available,
however, the clients will continue to synchronize to the LANTIME with worse
stratum. This way it is guaranteed that all the client devices on the network operate
using the same system time.
All changes of the reception status of one of the radio clocks, and also failure of the
hybrid clock's plausibility check are logged by the local Linux system and optionally
reported across the network. If the hybrid receiver passes the status "not
synchronized" to the NTP server, or it has disabled time information output at all,
then the alarm signal output of the LANTIME/SHS is activated.
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