| RE .0:
DECmcc uses the system time of whatever OS it is running on. This is
converted into the UTC (Universal Coordinated Time) time that DECmcc
uses internally. UTC time is the same everywhere. Only the timezone
offset changes from place to place.
If you are performing scheduling at the MCC_CALL interface using your
"AT EVERY 0:30" and the system time is changed somewhere in the middle
of execution, the scheduled times will track the new system time (they
will also shift).
Time stored in the MIR is actually a breakout of the UTC time. The UTC
time value and TDF (timezone offset from GMT) are the components
stored. They are broken out because they become part of the record keys.
Inaccuracy and version of UTC structure are lost.
In director to director communication, it is assumed that each director
has a correctly set system time. Thus, the UTC time values used by
the directors will be the same, no matter where on earth they are
located. Only the TDFs should be different between the directors.
DECmcc itself takes no responsibility for ensuring that the different
system times match. A facility such as DECdts or NTP has that task.
Ted
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