Executone CX 816
  • From station 100, take the handset off-hook.
  • Dial "*".
  • Dial "7764" (PROG).
  • Press the "FLASH" button.
  • Dial "28".
  • Enter time and date as follows: YYMMDDHHMMSS.
  • Press the "HOLD" button.

Enter time and date in the following formats-
Year (YY) =00-99
Month (MM) =01-12
Day (DD) =0-31
Hour (HH) =00-24
Minute (MM) =00-60
Second (SS) =00-60