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...Rule to 3,2,7,2,0;11,1,7,2,0;60 (this means change clocks the second sunday of March and back again the first sunday of November - i.e., the new savings times). For additional reference, here's how to configure the 'optional rule' field from the manual at http://support.vocalocity.com/grandstream_guide.pdf: This parameter controls whether the displayed time will be daylight savings time or not. If set to "Yes" and the Optional Rule is empty, then the displayed time will be 1 hour ahead of normal time. The "Automatic Daylight Saving Time Rule" shall have thefollowing syntax:...