NEC IPK II
Note: Change the clock from the attendant's station -- usually extension 10, 100,
or the first extension in the extension number range (i.e., 200 for 200 to 299 range
, etc.) -- with handset resting on the cradle and the phone not in use.
- Press SPEAKER button
- Dial 728
- Dial two digits for the hour (24 hour clock, 13 = 1:00 PM)
- Dial two digits for the minutes (00 thru 59)
- Press SPEAKER to exit