●The control unit is within 6 inches of a jack field.
●The network interface is available for installation or has already been installed.
●The wiring runs from the control unit to the voice terminal locations do not exceed 1000 feet.
●The temperature range of the location is between 40 and 104 °F (4 to 40 °C).
●The control unit location is safe from sources of extreme heat (furnaces, heaters, attics, or direct sunlight).
●The control unit has at least 1 inch of ventilation space around its sides.
●The control unit location is safe from exposure to corrosive gases, dust, chemicals, or similar substances.
●The humidity of the control unit location does not exceed 80 percent.
