178.2.1 ADD-SONUS

Installing/changing the table of switchover dates.
The table containing the switchover dates is read. If there is no file containing the table , one will be created by AMO SONUS.
The AMO checks, if the date is logically correct, and if it is older than the date obtained from the system time. One switchover to daylight saving and one to standard time is permitted for each year. The date specified in the AMO call is entered at the correct place in the switchover data. If a similar switchover has already been entered for this year, it will be overwritten.
To warrant the correct function of the time-switchover, all entries should be valid for the same hemisphere. The first entry lays down the hemisphere, for which the table is valid. All consecutive entries are checked against this first entry for validity.
The table will hold up to 20 switchover dates. Old dates are removed in every ADD. Dates more than nine years in advance of the year of the system time are rejected.
If there's no valid system time, no switchovers can be entered.
For a faultless operation of the DLS / standard time switchover, the entries to DLS and standard time should follow each other in alternating order. The AMO therefore checks whether the preceding entry is the logical reversal in the opposite direction.
When daylight saving time reverts to standard time, the period between 02:00 and 03:00 hours runs twice. To avoid mistakes, you are not allowed to change the time table during this period on the day of switchover.
Procedure Overview
 
Command Code
Parameter
ADD-SONUS
YEAR=<number>,MONTH=<number>,DAY=<number>
 
,TYPE=<param>;
Examples
1.
Installing a switchover to standard time
Input:
ADD-SONUS:1988,09,25,STD;
2.
Installing a switchover to daylight saving time
Input:
ADD-SONUS:1989,03,26,DLS;
Note:
If the table is created by the AMO, the function mode is set to “read from file“.
OpenScape 4000 V10, Volume 1: AMO Descriptions, Service Documentation, Issue 5, ID: P31003H31A0S107057620
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