AT&T SYSTEM 25 Manual page 94

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Programming Your Buttons and Personal Speed Dialing Codes
Use one of the following procedures to program a new number, to program a new
number over an old number, or to remove a previously-stored number. You can
program a maximum of:
4 digits in a FLEX DSS button
25 characters in a Personal Speed Dialing code
28 characters into a REP DIAL button
Programming or Removing a Number by Using the Switch
Slide the switch on the left side of the voice terminal to
1
Lift the handset and listen for dial tone.
2
3 Dial the number you want to program.
or
If you want to remove a number, continue to Step 4.
4 To indicate where this number should be stored or removed:
Press the
or
Dial the Personal Speed Dialing code ( #20 through #39),
including the
Listen for confirmation tone and dial tone.
5
Hang up.
6
7 Slide the switch back to the midpoint between "T" and "P".
NOTE:
ring every minute to remind you that you are in program mode.
or
[FLEX DSS] [REP DIAL]
If you do not adjust the switch, your voice terminal will
button.
Programming Numbers
"P".
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