NEC Dterm Owner's Manual page 50

Issue 1
3.
4.
Unlocking the Keypad
1.
2.
4 - 12
Press chan again.
prompts the user to continue.
Press the chan key again to confirm the entry. The
display is blank and the lock icon is displayed.
Press and hold the chan key for one second while in
standby mode. A code input and the lock icon appear in
the display.
Enter the 2-digit number used to lock the telephone.
The code appears in the display.
NEC America, Inc.
The LCD displays "Lock?", and
Dterm Cordless Handset