Assigning a Password to the Extension All extensions of the DX-80 system have an associated user password. Passwords are required to use Phone Lock, Call Forward Remote, and Attendant features. Note: Extension passwords can be changed at the extension only by using the Phone Lock feature. Passwords can be from four to eight characters in length. You may want to program the overall system password length before programming individual extension passwords. See Section 4.4, Setting User Password Lengths, Setting Passwords for System Directory Numbers 101, 102, and 108 for more details. Changes to the length of the user password affect existing passwords—the system adds or subtracts one default character to the end of the password. That is, if you extend the length of the password, the system increases all passwords by adding a 0 in the right-most position. If you reduce the length of the password, the system truncates all passwords by one character in the right-most position.