Change the time on phone system
1) press "Program", then * *, then 1234,
2) press "0 0 0",
3) press "speaker" two times,
4) change the time
5) press "store".
6) pick up the receiver to complete the change.
Do this change on the "lead" phone and it will reset all the others on your system. Not exactly an intuitive process to be sure!
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