The things that always seem the simplest on electronics generally turn out to be a complete pain. Setting the clock on the Panasonic KX-T7730 multi-line phone system is not quite as cut and dry as your run-of-the-mill home or cell phone. Since the Panasonic KX-T7730 is designed to run a multi-line system, you actually have to call the extension that has been assigned as your programming option in order to make any changes. This can increase in difficulty if you don't know the extension.
Call the programming extension (the default is 101 on most systems) to enter the programming menu. The phone service may have changed the default upon install, depending on what service you use. If extension 101 doesn't work, you'll need to call your phone service provider to find out the correct programming extension.
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Press "Program" and then the "0" button on the dialer to enter the program menu.
Enter the date using the following format: year, month, day and weekday (Monday equals "1," Tuesday equals "2," and so on). As an example, Tuesday, Nov. 13, 2010 at 8:00 a.m. uses the following string of numbers: 101133 1 0900 2.
Press the "Store" button on the phone base.
Press the "Program" button on the base.
Hang up the phone receiver.