NEC DS1000 - Connecting Analog and Digital Extensions

Features
18 DS1000/2000 Feature Handbook Supplement
At a 22- or 34-Button Display Telephone, you see:
At a Super Display Telephone, you see:
3. Enter your current PIN number + HOLD.
At a 22- or 34-Button Display Telephone, you see:
At a Super Display Telephone, you see:
4. Enter your new PIN number + HOLD.
At a 22- or 34-Button Display Telephone, you see:
At a Super Display Telephone, you see:
5. To confirm your entry, reenter the PIN number you just entered in step 4 above + HOLD.