Panasonic VL-VC3500BX Operation Instruction Manual page 7

When the room monitor is called, if the room monitor is not answ-
ered, the door station will give a voice prompt" Please press the key
to leave a message 25 seconds after the ringing, and you can press
the call key to leave a message at this time. The household can view
the message information from the visitor on the room monitor.
Note: For the function that the visitor calls the room monitor to
leave a message, the called room monitor is required to have the
message leaving function.
8.2 Exit Button and Door State Detection
Exit button：After the door opening button interface at the back
of the door station is connected to an external exit button
switch, when the user presses the exit button, the door
station will control the connected lock for the unlocking
operation.
Door state detection：After the door state button interface at the
back of the door station is connected to the door magnetic
probe, in case of is door opening overtime, the door station
will send the relevant alarm information to the residence
and the management center.
8.3 Parameter Setting Function
Enter the parameter setting：After removing the door station and
pressing the setting button on the back of the door station
in the case of the door station powered on, the door station
will give a beep sound which means that the equipment
enters the parameter setting state. Voice prompt "enter the
system setting", indicating that the equipment enters the
parameter setting state.
Function switching：During the parameter setting, the user swit-
ches the function through the "Call" key on the front of the
equipment. When it is switched to" Exit system setting ",the
system will automatically exit the parameter setting.
Exit the parameter setting：During the parameter setting, if the
user does not operate for more than 8 seconds, the system
will automatically exit the setting and beep sound.
8.4 Description of The Parameter Setting Item
Reset to Factory Mode
Prompt Switching
11 12
When switch to reset factory mode
function, press and hold the "Call"
button on the door station, and the
door station parameters will be reset
to the factory defaults..
When switch to prompt switching
function, press and hold the" Call"
button on the door station, and the
door station prompts to switch
between the English prompt and the
Chinese prompt.