Cant change time on nec etw phone - NEC Electra Professional ETW-16DC-2

Try this:

NEC Electra Telephone System

Changing the time on a Electra Elite & Professional system must be done from the "main" or primary phone. It is usually extension # 100. 1.- Press "FEATURE" 2.- Dial "9#" 3.- Enter hour and minute 4.- Press "RECALL" to change AM/PM setting 5.- Press "HOLD" to change the calendar setting 6.- Press "RECALL" to change the day of week 7.- Dial "#" to move the cursor to day of month field 8.- Enter day of month 9.- Press "RECALL" to select month 10.- Dial "#"to move the cursor to year field 11.- Enter last 2 digits of year 12.- Press "FEATURE"

Carl