## Disable/Enable Debug Mode

Use the following procedure to turn the debug mode for the button module serial port on or off.

1. While the telephone is on-hook and idle, press the following sequence of keys on the faceplate of the telephone:

Mute 3 3 2 8 4 # (Mute D E B U G #)

NOTE: Press the Mute button momentarily. Do not press this button while pressing other keys/buttons.

1. After entry of the command sequence, the following displays, based on the current value of the system value NVDEBUG:

If NVDEBUG = 1: | Debug mode=on 0=off #=OK

If NVDEBUG = 0: | Debug mode=off 1=on #=OK

If a value different from the current NVDEBUG value is entered, the following text displays left-justified at the top of the display:

Save new value? *=no #=yes

1. Press the * button to terminate the procedure, or the # button to save the new value. If you press the # button, the telephone displays the following text:

New value being saved

The telephone saves the new value.