Parent unit lights - VM3252 / VM3252-2

	On when the parent unit is linked to the baby unit. Flashes when the link to the baby unit being viewed is lost.
	On when the parent unit is connected to AC power, or the battery is charging. Flashes when the parent unit battery is low and needs charging. Off when the parent unit is disconnected from AC power.
	On when the speaker volume of the parent unit is turned off; or when the parent unit speaker is talking to the baby unit.
	On when the parent unit is talking to the baby unit.