Patent ID: 6766162
Filing Date: 2004-07-20
Classification: H04M,H04W

Abstract:
A message notification unit configured to communicate control information over a wireless interface to a base station, the base station configured to communicate with a messaging system regarding a message status for the message notification unit, the message notification unit comprising:an indicator having first and second human perceptible states to indicate the message status, the first state for indicating a no message waiting condition, and the second state for indicating a message waiting condition; a receiver configured to receive, over the wireless interface, a message signal from the base station containing information regarding the message status; a controller configured to maintain or change the state of the indicator to reflect the message status based on the message signal; and a transmitter configured to transmit a range signal to the base station periodically; wherein receipt of the range signal by the base station is an indication to the base station that the message notification unit is within a proper range to receive the message signal from the base station.