Instructions to change the time and date on Prostar 816
Enable customer programming;
With the hanset on-hook, dial #06. The display shows (MMC Disabled).
Dial the passcode 4321, and 1 and then dial #.
At this point customer programming is open. Follow the instructions as needed.
Set Date and Time
Dial #55 Display shows (YYMMDDWHHMM)
Dial new information as follows:
YY= The last two digits of the year
MM= The month (01-12)
DD= The day of the month (01-31)
W= The day of the week 1-7 week begins on Monday and ends on Sunday
HH= Hour (use 24 hour clock)
MM= Minutes (00-59)
Dial # to set current date and time. The phone returns to normal use.