Patent ID: 8886171

Claim:
A cellular telephone, comprising: a signal processing structure configured to communicate over one or more active wireless communications links for transmitting cellular telephone voice call signals and data signals different from said cellular telephone voice call signals; memory storing an audio signal for indicating termination of an active wireless communications link; an audio signal output device; a transceiver; and a communication link termination detector configured to perform operations of monitoring the transceiver and detecting the termination of the active wireless communications link; wherein said signal processing structure is configured to cause the audio signal to be supplied to the audio signal output device in response to determining the termination of said active wireless communication link, wherein the audio signal is operable to correct a user impression that the wireless communications link is still active; wherein detecting the termination of the active wireless communications link comprises: detecting absence of an expected and recurring signal, the absence being unnoticed by a user; confirming that the absence indicates the termination of the active wireless communications link, including initiating a transmission over the wireless communications link, the transmission corresponding to an expected response; and determining the termination of the active wireless communications link upon determining that the expected response does not occur.