NEC SL1000 Features And Specifications Manual page 617

ISSUE 2.0
2. Dial 852.
3. Press the key you want to program.
4. Dial * 03.
5. Dial the number of the extension you want to appear on the key.
6. Press Hold key once for Immediate Ring, (or skip to step 8 for Delayed Ring).
7. Dial the mode number in which the key rings.
8. Press Hold key again for Delayed Ring, (or skip to step 10).
9. Dial the mode number in which the key delays ringing.
10. Press Speaker key.
Features and Specifications Manual
SL1000/SL1100
S
1-607