This should help. Just as an FYI for future posts, please include the system you are working on and software version. Thanks.

Abbreviated Dialing:

The abbreviated dialing (AD) feature allows you to store selected phone numbers for quick and easy dialing. Each number can be a complete or partial phone number, and extension number, or a trunk or feature access code.

NOTE: You can also be able to program a 1.5 second pause in an AD number such as between an access code and the phone number. (Press the Menu button and then the softkey below Pause.)

NOTE: There is a 10 second time limit between your going off-hook and entering the first digit of an AD button, and then a 10 second time limit between each digit. If you hear intercept tone while you are programming the button, you have exceeded the time limit and you must begin again

To program a number into a personal list:
1. On a separate sheet of paper, write down the outside numbers, extensions, and/or feature access codes you want to store.
Note: Each phone number or feature access code is stored as a separate item.
2. Pick up the handset or press <Spkr>.
3. Press the Menu button and then the softkey below Prog (if available on your display).
or, Press <Program> (if administered).
or, Dial the Program code *0. [dial tone]
4. Dial the Personal List number (1, 2, or 3).
Note: Use only list 1
5. Dial the list item (01, 02, 03...).
Note: each list contains 20 locations, if you need more space, contact...
6. Dial the number you want to store (up to 24 digits).
Note: Be sure to dial 9 if calling outside of our system. You may also be able to use the softkeys to add AD special functions such as Pause.
7. Press #. [confirmation tone]
• The number is stored.
8. If you want to store additional items on the same list, repeat Steps 5 through 7. If you want to store items on another list, hang up and return to Step 1.
9. Hang up to end programming.
To place a call using an AD list:
1. Press <Pers List> or, Dial the appropriate Abbreviated Dialing List code:
List 1 8101
[dial tone]
2. Dial the desired list item (01, 02, 03...).
• The call is automatically dialed.

[Linked Image from phototiki.com]