Code Number Entry

Enter code number by pressing start keypad and input fixed number, and a continuous signal (beep) will start and last for about six seconds. Input code number by pressing respective keypad within six seconds, or while continuous signal is sounding. After code number has been entered, a repeated signal (beep) sounds to signal that number has been entered.
When entering a code number of seven figures, press keypads within six seconds (while continuous signal is sounding). A repeated signal (beep) sounds to tell registration right after number has been entered.
When entering a personal code number of five through seven figures, if it takes more than six seconds, a repeated signal (beep) will sound and numerals will be entered which have been entered by that time.
When it takes more than six seconds before the fourth figure of a code number has been entered, all the numerals that have been entered will be canceled. In this case the repeated signal will not sound.
If a wrong numeral is entered, press the clear keypad (serving also as the start keypad), enter the fixed number again, and then put in the code number.
If a continuous signal (beep) sounds and a repeated signal does not correspond with code number inputted, it indicates that the number corresponds to a number unavailable for entry. So input a new code number.