AT&T Merlin Legend MLX-10D User Manual page 82

Features
NOTE:
If you have programmed an outside Auto Dial
button with a specific account code followed by #,
you can press the button whenever you need to
enter the code. (See Account Code. )
Program account codes, access codes, and
outside numbers as outside Auto Dial buttons.
(Account codes must be followed by #.)
Special characters may be needed when you
program an outside Auto Dial button. See
Appendix A for more information on special
characters.
Auto Dial 5 - 9