Panasonic KX-HGT100 - KX-HGT100 LAN Connection Mode; Connection Mode Selection; DHCP Usage Note

5. HGT100 is made a factory default setting.
The power supply is turned on while pushing [PROGRAM], [OK], and [MUTE] at the
same time.
It is confirmed to become "Not configured Web setting" screen.
figure of HGT100
OK button
MUTE button
PROGRAM button